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Duty Cycle patents



      

This page is updated frequently with new Duty Cycle-related patent applications.




Date/App# patent app List of recent Duty Cycle-related patents
07/21/16
20160212816 
 Light emitting diode driver patent thumbnailLight emitting diode driver
Devices, systems, software, and methods for control of light emitting diodes (leds) via an led driver circuit that receives a dimmed ac input signal from a dimmer and generates an output signal to power and dim an led element. The led driver circuit comprises a dimmed input sense circuit, a microcontroller, and a power supply circuit.
Crestron Electronics, Inc.


07/21/16
20160212811 
 Light-emitting diode lighting device with synchronized pwm dimming control patent thumbnailLight-emitting diode lighting device with synchronized pwm dimming control
An led lighting device includes a luminescent circuit, a detecting circuit, an adjustable current source and a dimming control circuit. The luminescent circuit is driven by a rectified ac voltage for providing light.
Iml International


07/21/16
20160212713 
 Managing power consumption of transmission circuitry in a wireless communication device patent thumbnailManaging power consumption of transmission circuitry in a wireless communication device
Methods, apparatuses and computer readable media are described that manage transmit power levels for a wireless device connected to a network access system of a wireless network. Processing circuitry in the wireless device obtains a target average transmit power level.
Apple Inc.


07/21/16
20160211914 
 Method and  power-efficient joint dimming and visible light communication patent thumbnailMethod and power-efficient joint dimming and visible light communication
A method, an apparatus, and a computer program product for communication are provided. The apparatus obtains a message for communication using visible light communication (vlc) through a light emitting diode (led) luminary device and formats the message using a synchronization signal followed by one or more data signals.
Qualcomm Incorporated


07/21/16
20160211774 
 Power converter with pre-compensation for dead-time insertion patent thumbnailPower converter with pre-compensation for dead-time insertion
A power converter has a phase leg with upper and lower switching devices coupled across a dc link. A junction between the devices is coupled to a load.
Ford Global Technologies, Llc


07/21/16
20160211747 
 Low input voltage boost converter with peak inductor current control and offset compensated zero detection patent thumbnailLow input voltage boost converter with peak inductor current control and offset compensated zero detection
The low input voltage boost converter with peak inductor current control and offset compensated zero detection provide a boost converter scheme to harvest energy from sources with small output voltages. Some embodiments described herein includes a thermoelectric boost converter that combines an ipeak control scheme with offset compensation and duty cycled comparators to enable energy harvesting from teg inputs as low as 5 mv to 10 mv, and the peak inductor current is independent to first order of the input voltage and output voltage.
University Of Virginia Patent Foundation


07/21/16
20160207657 
 Method of controlling a rate at which an upstream process feeds a conditioned product to a downstream process patent thumbnailMethod of controlling a rate at which an upstream process feeds a conditioned product to a downstream process
A method of controlling an upstream and a downstream process wherein the upstream process conditions a stream of product delivered to the downstream process is provided. The control method uses an empirically determined formula to determine a metric for adjusting the activity of the upstream process to thereby adjust the rate with which the upstream process conditions and feeds a stream of conditioned product to the downstream process.
Heat And Control, Inc.


07/21/16
20160207411 
 Device for charging an automotive vehicle battery making it possible to compensate for the harmonics, automotive vehicle furnished with such a charging device and corresponding  charging patent thumbnailDevice for charging an automotive vehicle battery making it possible to compensate for the harmonics, automotive vehicle furnished with such a charging device and corresponding charging
A battery charging device for a motor vehicle battery with at least partially electric traction includes a filtering stage to be connected to an electrical power supply network, a voltage buck stage connected to the filtering stage, a voltage boost stage coupled to the voltage buck stage and to be connected to the battery, and a regulation unit to impose chopping duty cycles on the voltage buck stage and on the voltage boost stage. The regulation unit compensates the harmonics generated by the voltage buck stage in the filtering stage, acting on the voltage buck stage..
Renault S.a.s.


07/21/16
20160206507 
 Implantable electroacupuncture device and method patent thumbnailImplantable electroacupuncture device and method
An electroacupuncture device includes 1) a housing configured to be implanted beneath a skin surface of the patient at an acupoint within the patient, 2) a central electrode centrally located on a first surface of the housing, 3) an annular electrode that surrounds the central electrode on the first surface of the housing, the annular electrode being spaced apart from the central electrode, and 4) pulse generation circuitry located within the housing, wherein the pulse generation circuitry generates stimulation sessions at a duty cycle that is less than 0.05 and applies the stimulation sessions at the acupoint by way of the central electrode and the annular electrode in accordance with the duty cycle.. .
Valencia Technologies Corporation


07/14/16
20160205756 
 Method and  determining a target light intensity from a phase-control signal patent thumbnailMethod and determining a target light intensity from a phase-control signal
A dimmable ballast circuit for a compact fluorescent lamp controls the intensity of a lamp tube in response to a phase-control voltage received from a dimmer switch. The ballast circuit comprises a phase-control-to-dc converter circuit that receives the phase-control voltage, which is characterized by a duty cycle defining a target intensity of the lamp tube, and generates a dc voltage representative of the duty cycle of the phase-control voltage.
Lutron Electronics Co., Inc.


07/14/16
20160204674 

Electric power tool and motor control method thereof


An electric power tool includes a motor, a power supply circuit for supplying power to the motor, and a control device which is able to measure current of the motor and control duty cycle of the power supply circuit. When the measured current of the motor is greater than a predetermined current value, the duty cycle of the power supply circuit is increased to a first predetermined value.
Nanjing Chervon Industry Co., Ltd.


07/14/16
20160203962 

High duty cycle ion spectrometer


An ion spectrometer is provided, comprising: an ion source, arranged to generate ions continuously with a first range of mass to charge ratios; and an ion trap, arranged to receive ions from the ion source along an axis, and to eject ions with a second range of mass to charge ratios orthogonally to that axis, the second range of mass to charge ratios being narrower than the first range of mass to charge ratios. In some embodiments, ions generated by the ion source continuously flow into the ion trap.
Thermo Fisher Scientific (bremen) Gmbh


07/14/16
20160202838 

Noise eliminating method and adapter


A noise eliminating method adapted to be used with an adapter and a touch device electrically connected with each other is provided. The adapter includes a voltage transformer, a switch and a control circuit.
Au Optronics Corp.


07/14/16
20160200201 

Systems and methods for determining a duty cycle for a variable voltage converter


A vehicle includes a traction battery, an electric machine, and a variable voltage converter. The variable voltage converter includes an inductor and is disposed electrically between the traction battery and electric machine.
Ford Global Technologies, Llc


07/14/16
20160199227 

System and process for retina phototherapy


A system and process for treating retinal diseases includes passing a plurality of radiant beams, i.e., laser light beams, through an optical lens or mask to optically shape the beams. The shaped beams are applied to at least a portion of the retina.
Ojai Retinal Technology, Llc


07/07/16
20160197611 

Reference voltage training device and method thereof


Provided are a reference voltage training device and a method thereof. The reference voltage training device includes a comparator configured to compare a toggle signal with a reference voltage and output a comparison signal, a duty cycle detector configured to check a duty ratio of the comparison signal, and a reference voltage level changing unit configured to fix the reference voltage when the duty ratio meets a predetermined condition and to change a level of the reference voltage when the duty ratio does not meet the predetermined condition.
Samsung Electronics Co., Ltd.


07/07/16
20160197486 

Method and wireless power in-band signaling by load generation


Exemplary implementations are directed to wireless power in-band signaling by load generation. An apparatus for communicating with a wireless power transmitter is provided.
Qualcomm Incorporated


07/07/16
20160195287 

Holding cabinets with closed-loop environmental control systems, methods for controlling environmental conditions in holding cabinets, and computer-readable media storing instructions for implementing such methods


Methods disclosed herein may be methods for maintaining environmental conditions in a cabinet. Such methods may comprise determining a relative humidity set point.
Henny Penny Corporation


07/07/16
20160194179 

Elevator braking in a battery powered elevator system


An elevator system includes a battery; a machine having a motor to impart motion to an elevator car; an inverter having a plurality of switches to convert dc power from the battery to ac power for the machine in a motoring mode; a speed sensor coupled to the machine, the speed sensor to generate a speed signal indicative of machine speed; and a controller to apply braking signals to a group of the switches in a braking mode, the braking signals having a duty cycle in response to the speed signal.. .
Otis Elevator Company


06/30/16
20160192452 

Method and system for modifying a beacon light source for use in a light based positioning system


In one aspect, the present disclosure related to a method for modifying a beacon light source for use in a light-based positioning system. In some embodiments, the method includes selecting a modulation scheme for the light source, determining a duty cycle for the light source based on the modulation scheme, the duty cycle having a proportion of time the light source is in an on state and a corresponding proportion of time the light source is in an off state, the proportion of time the light source is in an off state resulting in reduced luminosity of the light source, and supplying additional power to the light source to compensate for the reduced luminosity of the light source by the duty cycle..

06/30/16
20160192328 

Dynamic adaptive and non-adaptive mode switching


A method of operating a transceiver may comprise operating in an adaptive mode in which transmissions from the transceiver are halted after detection of interference, performing a clear channel assessment (cca), as a result of the cca, detecting energy from an interferer above a predetermined threshold, and switching operation to a non-adaptive mode in which the transceiver is configured to alternate transmission periods and idle periods according to a duty cycle. Then, the method may comprise performing an energy detect, as a result of the energy detect, subsequently detecting the energy from the interferer below the predetermined threshold, and switching operation to the adaptive mode..

06/30/16
20160191046 

Methods and systems for operating hybrid power devices using multiple current-dependent switching patterns


An integrated circuit includes a hybrid switch having first and second switching devices of different type therein. A control circuit is provided, which is configured to drive the first and second devices with respective first and second control signals having first and second unequal duty cycles, respectively, when the first and second devices are supporting a forward current in a first current range.

06/30/16
20160191024 

Implementing clock receiver with low jitter and enhanced duty cycle


A method and a clock receiver circuit for implementing low jitter and enhanced duty cycle, and a design structure on which the subject circuit resides are provided. The clock receiver circuit accepts single-ended complementary metal oxide semiconductor (cmos) and differential clock signals.

06/30/16
20160191023 

Implementing clock receiver with low jitter and enhanced duty cycle


A method and a clock receiver circuit for implementing low jitter and enhanced duty cycle, and a design structure on which the subject circuit resides are provided. The clock receiver circuit accepts single-ended complementary metal oxide semiconductor (cmos) and differential clock signals.

06/30/16
20160191021 

Methods and systems for operating hybrid power devices using driver circuits that perform indirect instantaneous load current sensing


An integrated circuit is provided with an mcu, which is configured to generate a pwm control signal that is free of switching pattern information therein. A current-estimating gate driver is provided, which is responsive to the pwm signal.

06/30/16
20160190931 

Buck-boost power converter and associated mode transition control module


A buck-boost power converter and a mode transition control module. The mode transition control module includes a buck duty cycle sensing and comparison circuit and a boost duty cycle sensing and comparison circuit.

06/30/16
20160188919 

Method and energy harvest from a proximity coupling device


The disclosure generally relates to a method and apparatus for energy harvest from a proximity coupling device (pcd) by a proximity integrated circuit card. In one embodiment, the picc includes an integrated ble.

06/30/16
20160187908 

Micro demand response scheduling


A method includes generating a duty cycle expression for heating, ventilation, air condition (hvac) systems. The method includes estimating a baseline cycling percentage that maintains an indoor temperature at a particular setpoint based on the generated duty cycle expression and a curtailed cycling percentage that maintains the indoor temperature within a particular temperate interval of the particular setpoint.

06/30/16
20160186682 

Zero flow lubrication for a high pressure fuel pump


Methods and systems are providing for improving zero flow lubrication (zfl) of a high pressure fuel pump coupled to direct fuel injectors via a direct injection fuel rail. A zfl transfer function for the fuel pump is learned while fuel is at non-nominal fuel bulk modulus conditions and corrected for variations from a nominal fuel bulk modulus estimate.

06/23/16
20160182060 

Duty cycle detection circuit and semiconductor apparatus including the same


A duty cycle detection circuit may include a detection block configured to generate a duty detection signal by detecting a duty cycle of an input clock; and a current amount control block configured to control a current flowing through the detection block in response to the input clock, regardless of a variation in a frequency of the input clock.. .

06/23/16
20160182019 

Duty cycle detection circuit and method


A duty cycle detection circuit may include: a timing signal generation unit to generate a plurality of timing signal groups by selectively combining multi-phase clock signals according to an enable signal; and a detection unit to generate a duty detection signal by selectively combining signals of the plurality of timing signal groups according to the enable signal.. .

06/23/16
20160181988 

Methods and circuits to reduce pop noise in an audio device


A class d amplifier receives and amplifies a differential analog signal which is then differentially integrated. Two pulse width modulators generate pulse signals corresponding to the differentially integrated analog signal and two power units generate output pulse signals.

06/23/16
20160181933 

Method to reduce losses in a high voltage dc link converter


A multiple stage switching type converter circuit provided between an ac source and a dc source is provided. The circuit includes a boost converter stage coupled to the ac source, a dc link capacitor stage comprising a dc link capacitor decoupled from an ac source and a dc source, and an isolated dc-dc converter stage coupled to the dc source.

06/23/16
20160181929 

Flyback converter output current evaluation circuit and evaluation method


An output current calculating circuit for a flyback converter operating under ccm and dcm is disclosed. The off current value ion and the blanking current value ileb flowing through a sensing resistor are calculated using a detection module and are summed together using a current summing unit.

06/23/16
20160181927 

System and a switched-mode power supply


In accordance with an embodiment, a method of operating a switched-mode power supply includes starting up the switched-mode power supply by applying a first switching signal to a control node of the first switching transistor and a second switching signal to a control node of a second switching transistor, where a duty cycle of the first switching signal is less than a duty cycle of the second switching signal. After starting up the switched mode power supply, the switched mode power supply is operated by applying a third switching signal to the control node of the first switching transistor and a fourth switching signal to the control node of the second switching transistor, where a duty cycle of the third switching signal is substantially equal to a duty cycle of the fourth switching signal..

06/23/16
20160181920 

Buck-boost power converter and operation thereof


A method comprises detecting an input voltage and an output voltage of a buck-boost converter, wherein the buck-boost converter comprises a first high-side switch and a first low-side switch connected in series across an input capacitor, a second high-side switch and a second low-side switch connected in series across an output capacitor and an inductor coupled between a common node of the first high-side switch and the first low-side switch, and a common node of the second high-side switch and the second low-side switch and configuring the buck-boost converter such that at least one of the first high-side switch and second low-side switch operates at a fixed duty cycle mode.. .

06/23/16
20160181798 

Bidirectional electrical signal converter


A bidirectional ac-to-dc and dc-to-ac circuit includes a first inductor-capacitor (lc) circuit connected to an ac power source, a transistor synchronized with the ac power source signal, a second lc circuit electrically connected to the synchronized transistor and the first inductor-capacitor circuit, a high-frequency switching transistor electrically connected to the second inductor-capacitor circuit and a direct current (dc) load, and a controller connected to the high-frequency switching transistor. The controller identifies an error between a measured dc output signal and a predetermined dc output signal that is applied to the dc load, and adjusts a duty cycle of a pulse width modulation (pwm) switching signal for the high-frequency transistor to reduce the identified error..

06/23/16
20160180537 

Method and system for modifying a beacon light source for use in a light based positioning system


In one aspect, the present disclosure related to a method for modifying a beacon light source for use in a light-based positioning system. In some embodiments, the method includes selecting a modulation scheme for the light source, determining a duty cycle for the light source based on the modulation scheme, the duty cycle having a proportion of time the light source is in an on state and a corresponding proportion of time the light source is in an off state, the proportion of time the light source is in an off state resulting in reduced luminosity of the light source, and supplying additional power to the light source to compensate for the reduced luminosity of the light source by the duty cycle..

06/23/16
20160178554 

Nanopore-based sequencing with varying voltage stimulus


A method of analyzing a molecule is disclosed. A voltage source is selectively connected to or disconnected from a capacitor using a switch controlled by a reset signal.

06/16/16
20160174340 

Digital communication receiver interface circuit for line-pair with duty cycle imbalance compensation


A circuit (200) includes: a diode bridge (210) having polarity-independent input terminals for coupling to a dali bus, and having positive and negative output terminals, wherein the diode bridge receives a receive signal from the dali bus; a galvanic isolation device (220) having an input for receiving the receive signal from the diode bridge, and an output for outputting the receive signal galvanically isolated from the diode bridge and the dali bus; a receive signal threshold reference device (235) for setting a threshold voltage for the galvanic isolation device to respond to the receive signal; an amplifier (280) for receiving the galvanically isolated receive signal from the galvanic isolation device and outputting a binary digital signal via a low pass filter (290); and a first duty cycle control device (230, 270) for adjusting the timing of rising edges of the galvanically isolated receive signal with respect to its falling edges.. .
Koninklijke Philips N.v.


06/16/16
20160174319 

Systems and methods for dimming of a light source


In embodiments, improved capabilities are described for dimming performance of lighting methods and systems, such as the improvement of dimming led lamps that are dimmed from standard external dimming devices. Methods and systems for improving dimming performance include a fast startup override facility for overriding a default dimming function of the lamp's electronics through forcing the lamp electronics to operate with a higher than normal duty cycle to ensure the lamp electronics can deliver higher than normal power to an led module during a dimming current level startup condition.
Ecosense Lighting Inc.


06/16/16
20160174159 

Terminal requested base station controlled terminal transmission throttling


A method for terminal requested base station controlled terminal transmission throttling includes transmitting a throttling request signal to the base station, the throttling request signal including data indicating to the base station to issue a discontinuous uplink transmission grant to the terminal, wherein the throttling request signal includes data representing a maximum duty cycle of forthcoming discontinuous uplink transmissions from the terminal to the base station, receiving from the base station the discontinuous uplink transmission grant, and transmitting discontinuous uplink transmissions from the terminal to the base station that do not exceed the maximum duty cycle, wherein the maximum duty cycle corresponds to discontinuous uplink transmission bursts of less than a time t corresponding to continuous uplink transmissions.. .
Sony Mobile Communications Ab


06/16/16
20160173067 

System and enhanced clocking operation


A circuit, integrated circuit, system tor implementation in an integrated circuit, and method of operating such a circuit, integrated circuit, or system are disclosed herein. In one example embodiment, the such a circuit includes a multiplier circuit portion, a first duty cycle correction (dcc) circuit portion, and a clock gating circuit portion.
Freescale Semiconductor, Inc.


06/16/16
20160173029 

Noninvasive monitoring of a photovoltaic system


A method for determining a photovoltaic (pv) current from each of a plurality of pv elements arranged in a differential network is provided. The differential network is controlled with a plurality of control signals, where the differential network includes a plurality of inductors, and each control signal has a duty cycle.
Texas Instruments Incorporated


06/16/16
20160172895 

Wireless power transfer method, apparatus and system for low and medium power


A wireless power transfer method for a wireless power transfer apparatus using full and half-bridge inverter topologies includes detecting whether or not a wireless power receiver is present within a range of power being transferrable in a wireless manner, transmitting a detection signal to the wireless power receiver, receiving at least one of identification information and setting information from the wireless power receiver, receiving a control error packet from the wireless power receiver, and controlling an amount of power to be transferred by using the combination of a driving frequency, a duty cycle or a power signal phase to the full or half-bridge inverter.. .
Lg Electronics Inc.


06/16/16
20160169124 

Controller for internal combustion engine


A controller for controlling an internal combustion engine includes a valve timing adjuster, a variable valve lift mechanism and a processor. The processor controls a duty cycle of a drive signal in a selected one of control modes, thereby changing a relative rotational phase of a camshaft relative to an engine output shaft.
Toyota Jidosha Kabushiki Kaisha


06/09/16
20160165536 

Reduction of power consumption in a half-duplex transceiver


Circuits and methods for reducing power consumption in a half-duplex transceiver are disclosed. In an embodiment, a power management circuit of half-duplex transceiver includes direct current to direct current (dc-dc) converter and snooze mode controller.
Texas Instruments Incorporated


06/09/16
20160164507 

Apparatus and generating quadrupled reference clock from single-ended crystal oscillator


A method, an apparatus, and a computer program product are provided. The apparatus outputs a sinusoidal signal according to a first clock frequency, generates, a first digital signal having a 25% duty cycle based on the sinusoidal signal, generates a second digital signal having a 25% duty cycle based on the sinusoidal signal, combines the first digital signal and the second digital signal to generate a combined digital signal having a 50% duty cycle and a second clock frequency that is double the first clock frequency, and doubles the second clock frequency of the combined digital signal to generate an output signal having a third clock frequency that is quadruple the first clock frequency.
Qualcomm Incorporated


06/09/16
20160164500 

Digital current sensing in power controller


Some embodiments include apparatus and methods having a node to provide a signal, and a control unit arranged to control a value of an output voltage at an output node on an output path based on a duty cycle of the signal and a value of an input voltage. The control unit can also be arranged to cause a change in a resistance on the output path in order to determine a value of a current on the output path based at least on the change in the resistance..
Intel Corporation


06/09/16
20160164412 

Current mode switching power supply having separate ac and dc current sensing paths


In a current mode switching power supply, current through the inductor needs to be sensed to control the peak current. The inductor current includes a dc component and an ac component containing switching noise.
Linear Technology Corporation


06/09/16
20160164407 

Method of current compensation based on division-sigma control for dc/dc converter


A method is provided for current compensation. The method is based on division-sigma (d-Σ) control for a dc/dc converter.
National Tsing Hua University


06/09/16
20160160780 

A control system and operating a control system


An electronic control unit suitable for a motorcycle provides diagnostic support, tachometer drive and warning lamp drive all multiplexed onto one pin and driven by a single driver circuit. In a diagnostics mode, the pin is connected to diagnostic equipment.
Efi Analytics, Inc.


06/02/16
20160157314 

Led controllers, drivers and lighting circuits


A controller for controlling a plurality of led lighting strings is disclosed, the controller comprising, for each of the plurality of led lighting strings: a frequency modulator configured to modulate a baseline frequency to generate a time-vary modulated frequency, wherein the frequency modulator is configured to modulate the baseline frequency by a jitter superposed on a regular repeating pattern which varies more slowly than the jitter, to result in the modulated frequency; and a modulated pwm signal generator configured to generate a modulated pwm signal having the modulated frequency and a predetermined duty cycle; wherein the regular repeating patterns for the pwm signals are spaced apart in phase. Associated drivers, led lighting circuits and methods are also disclosed..
Nxp B.v.


06/02/16
20160157181 

Radio resource control technique


A technique for controlling a duty cycle of a transmitter (124) in a mobile device (120) is provided. When the mobile device is wirelessly connected to a telecommunications network (100), discontinuous reception and transmission is provided by a duty cycle including an active state and an inactive state.
Telefonaktiebolaget L M Ericsson (publ)


06/02/16
20160156342 

Electronic device having a delay locked loop, and memory device having the same


An electronic device includes a first duty cycle correction circuit, a delay line, a second duty cycle correction circuit, and a delay control circuit. The first duty cycle correction circuit is configured to detect a duty cycle error of a clock signal by performing time-to-digital conversion on the clock signal, and to generate a corrected clock signal by adjusting a duty cycle of the clock signal based on the duty cycle error of the clock signal.
Samsung Electronics Co., Ltd.


06/02/16
20160156273 

Method and a control circuit with multiple operating modes


A method for controlling a power converter switch to regulate power delivered to an output of a power converter includes operating the power converter switch in first, second, and third duty cycle control modes in response to a feedback signal. The first duty cycle control mode includes modulating a peak switch current of the power converter switch in response to the feedback signal, and switching the power converter switch at a substantially fixed first switching frequency value.
Power Integrations, Inc.


05/26/16
20160149549 

Alarm tone adjustment circuit and electronic device applying the circuit


An alarm tone adjustment circuit includes a sound collection unit with a function of collecting sound of a surrounding environment, an analog-digital (a/d) convertor, and a processing unit. The a/d convertor transforms the sound of a surrounding environment from the sound collection unit to a digital signal.
Hon Hai Precision Industry Co., Ltd.


05/26/16
20160149529 

Generator excitation regulation using pulse width modulation


A system may be configured to provide a regulated generator field current to a generator to acquire a regulated output voltage of the generator. In one example, the system comprises a controller configured to provide an actuator control signal on the basis of an error signal, an actuator configured to provide on the basis of the actuator control signal a pulse-width modulated output voltage that is configured to drive the regulated generator field current into the generator, the pulse-width modulated output signal having a duty cycle controlled by the actuator control signal, and an error evaluator configured to provide the error signal based on a combination of a first deviation signal and a second deviation signal..
Infineon Technologies Ag


05/26/16
20160149480 

Power supply with low voltage protection and operating the same


A power supply with low voltage protection provides an output voltage. The power supply includes a driving switch and a control unit.
Power Forest Technology Corporation


05/26/16
20160149369 

Systems and methods for supplying power to and cooling dental laser systems


A dental laser system is configured to provide high peak laser power, low duty cycle laser pulses, yielding a low average laser power and thus a reduced need for cooling. The laser power system may be configured to provide the electrical power required to produce the low average laser power and not the high peak laser power, and may include a capacitor bank section configured to provide the electrical power needed to produce the high peak power laser pulses.
Convergent Dental, Inc.


05/26/16
20160147248 

Reference signal generator and the method thereof


A reference signal generator used with a switching mode power supply which converts an input voltage to an output voltage. The reference signal generator provides a reference signal consisting of a constant voltage signal and a variable voltage signal which is varying according to a duty cycle of the switching mode power supply during a startup period of the switching mode power supply and is varying according to a ratio of the input voltage at an end of the startup period to the input voltage of real time after the startup period..
Monolithic Power Systems, Inc.


05/19/16
20160142059 

Differential odd integer divider


A differential odd integer divider provides low power and compact sub-harmonics of an applied square or sinusoidal clock signal with self-aligned 50% duty cycle. The odd integer divider circuit includes a set of low power delay cells connected in a ring fashion.
Texas Instruments Incorporated


05/19/16
20160137477 

System and generating a drive signal


A method and computer program product for defining a pwm drive signal having a defined voltage potential. The pwm drive signal has a plurality of “on” portions and a plurality of “off” portions that define a first duty cycle for regulating, at least in part, a flow rate of a pump assembly.
Deka Products Limited Partnership


05/19/16
20160135692 

Methods and systems for power optimization in a medical device


A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized.
Covidien Lp


05/12/16
20160134377 

Method and transmitting phase shift keyed optical signals


A burst-mode phase shift keying (psk) communications apparatus according to an embodiment of the present invention enables practical, power-efficient, multi-rate communications between an optical transmitter and receiver. Embodiments may operate on differential psk (dpsk) signals.
Massachusetts Institute Of Technology


05/12/16
20160134366 

Optical orthogonal frequency division multiplexing (o-ofdm) system with pulse-width modulation (pwm) dimming


An optical orthogonal frequency division multiplexing (o-ofdm) system with pulse-width modulation (pwm) dimming includes a driver responsive to one or more predetermined dimming set points configured to generate pwm signals having a predetermined duty cycle and configured to supply current to one or more light emitting diodes (leds). An o-ofdm generator responsive to the one or more predetermined dimming set points and digital data is configured to generate digital inverted o-ofdm signals during on-states of the pwm signals and non-inverted o-ofdm signals during off-states of the pwm signals according to the predetermined duty cycle and convert the digital inverted o-ofdm signals and the digital non-inverted o-ofdm signals to analog output o-ofdm signals.
Trustees Of Boston University


05/12/16
20160134192 

Power supply system


A power supply system includes a rectifier circuit, a voltage decreasing circuit, and a feedback circuit. The rectifier circuit receives an ac voltage, and converts the ac voltage to a rectifying dc voltage.
Hon Hai Precision Industry Co., Ltd.


05/12/16
20160134134 

Inductive power supply with duty cycle control


An inductive power supply that maintains resonance and adjusts duty cycle based on feedback from a secondary circuit. A controller, driver circuit and switching circuit cooperate to generate an ac signal at a selected operating frequency and duty cycle.
Access Business Group International Llc


05/12/16
20160134132 

Adaptive inductive power supply


A contactless power supply has a dynamically configurable tank circuit powered by an inverter. The contactless power supply is inductively coupled to one or more loads.
Access Business Group International Llc


05/12/16
20160132625 

Method and system for calculating model parameters for a capacitor to be modelled


Method for calculating model parameters for a capacitor to be modelled, the method comprising the following steps of: incorporating the capacitor to be modelled into a dc to dc converter with at least a first switching element; connecting a resistive load between the output terminals; applying an input voltage to the input terminals of the converter; controlling the first switching element in accordance with a frequency and duty cycle in order to obtain a current varying periodically in time through the capacitor to be modelled; measuring at least a first quantity representative of the current through the capacitor and at least a second quantity representative of the voltage across the capacitor; determining on the basis of the measured first and second quantities at least one current value for the current through the capacitor and at least one voltage value for the voltage across the capacitor.. .
Mindcet Bvba


05/12/16
20160131712 

Wellness monitoring of electromagnetic switching devices


One embodiment describes a tangible, non-transitory, computer-readable medium storing instructions executable by a processor of an operating coil driver circuitry. The instructions include instructions to instruct a switch to supply a specific current to an operating coil of a switching device using a pulse-width modulated signal; determine duty cycle of the pulse-width modulated signal; and determine wellness of the switching device based at least in part on the duty cycle of the pulse-width module signal..
Rockwell Automation Technologies, Inc.


05/12/16
20160131254 

Continuously variable transmission device


In order to reduce the amount of time from when signals are sent to solenoid valves 19, 23, 24 for adjusting hydraulic pressures inside hydraulic pressure chambers of various hydraulic devices 7, 8, 14 assembled in a continuously variable transmission device until the hydraulic pressures are actually changed is shortened, the solenoid valves 19, 23, 24 adjust the hydraulic pressures inside hydraulic pressure chambers connected to hydraulic introduction paths where the solenoid valves 19, 23, 24 are provided by adjusting apertures of the solenoid valves 19, 23, 24 set according to duty cycles, and a controller 16 for the solenoid valves 19, 23, 24, when the apertures of solenoid valves 19, 23, 24 are changed beyond specified values to desired apertures, adjusts the apertures beyond the desired apertures to a state where the apertures have been changed a maximum amount, then after a specified amount of time, returns the apertures to the desired apertures.. .
Honda Motor Co., Ltd.


05/12/16
20160129446 

Microfluidic devices with integrated resistive heater electrodes including controlling and measuring the temperatures of such heater electrodes


The invention relates to methods and devices for control of an integrated thin-film device with a plurality of microfluidic channels. In one aspect, the present invention provides a method for controlling the temperature of a heater electrode associated with a microfluidic channel of a microfluidic device, wherein power applied to the heater electrode is regulated by varying the duty cycle of a pulse width modulation (pwm).
Canon U.s. Life Sciences, Inc.


05/05/16
20160128162 

Lighting system including time of flight ranging system


A lighting system includes a light emitting diode array, and a time of flight ranging system. A logic circuit determines a distance to an object using the time of flight ranging system and controls the light emitting diode array based upon the distance to the object.
Stmicroelectronics (research & Development) Ltd.


05/05/16
20160128160 

Control of illumination devices using dc-dc converters


In an embodiment, method of controlling an illumination device by an output signal of a dc-dc converter is disclosed. The output signal is controlled by a pwm signal.
Texas Instruments Incorporated


05/05/16
20160128149 

Method and system for modifying a beacon light source for use in a light based positioning system


In one aspect, the present disclosure related to a method for modifying a beacon light source for use in a light-based positioning system. In some embodiments, the method includes selecting a modulation scheme for the light source, determining a duty cycle for the light source based on the modulation scheme, the duty cycle having a proportion of time the light source is in an on state and a corresponding proportion of time the light source is in an off state, the proportion of time the light source is in an off state resulting in reduced luminosity of the light source, and supplying additional power to the light source to compensate for the reduced luminosity of the light source by the duty cycle..
Abl Ip Holding Llc


05/05/16
20160127473 

Vehicle communication system


A communication system for facilitating control over a function of a vehicle (102) comprises a base station (104) positioned in the vehicle (102) and a mobile communication unit (122). The base station (104) comprises a first transmitter for transmitting a signal to the mobile communication unit (122) and a first receiver for receiving a signal from the mobile communication unit (122).
Jaguar Land Rover Limited


05/05/16
20160126839 

Boost converters having self-adaptive maximum duty-cycle-limit control


In one embodiment, a control circuit adjusts a duty cycle of a boost converter and comprises a duty cycle limiter generator configured to receive an input voltage provided to the boost converter and to generate a control signal to be provided to the boost converter for adjusting the duty cycle of the boost converter to control the output voltage of the booster converter in response to the input voltage. In one embodiment, the maximum duty cycle limit generator further generates the maximum duty cycle signal in response to an output voltage of the boost converter..
Qualcomm Incorporated


05/05/16
20160126730 

Current sense techniques in a power supply system


Generally, this disclosure describes a system for sensing current in a power supply system. The apparatus includes controller circuitry to select a first power supply of a plurality of power supplies, determine a reference output voltage (voutr) associated with a reference supply based, at least in part, on a duty cycle (d) and an input voltage (vin), d and vin related to the first power supply.
Intel Corporation


05/05/16
20160126069 

Pulse plasma apparatus and drive method thereof


A pulse plasma apparatus includes a process chamber, source rf generator configured to supply first and second level rf pulse power having first and second duty cycles to an upper electrode of the process chamber, a reflected power indicator configured to indicate reflection rf power, a first matching network, and a controller. The first matching network is configured to match an impedance of the process chamber with an impedance of the source rf generator as a first or second matching capacitance value, respectively when the first level rf pulse power or second level rf pulse power is supplied, respectively.
Samsung Electronics Co., Ltd.


05/05/16
20160125866 

Variable rate adaptive active noise cancellation


A method of audio signal processing includes determining a difference between a first set of filter parameters of a first input frame of an active noise cancellation (anc) filter and a second set of filter parameters of a second input frame of the anc filter. The method further includes selectively modifying a duty cycle of adaptive anc processing associated with the anc filter based on the difference between the first set of filter parameters and the second set of filter parameters..
Qualcomm Incorporated


05/05/16
20160124356 

Image forming apparatus


An image forming apparatus includes: a fixing part including a heater, and a first temperature detection part configured to detect the temperature of the heater; a chopper circuit including a reactor, a freewheeling element, and a switching element, the chopper circuit being configured to switch an input direct current on and off in a specified duty cycle by using the switching element and to supply the current to the heater; and a control part configured to control the duty cycle based on a detection result obtained by the first temperature detection part, as well as to control a switching frequency of the switching element based on an operation mode of the image forming apparatus.. .
Konica Minolta, Inc.


04/28/16
20160119611 

Time of flight depth camera


A method for operating a time of flight (tof) depth camera is provided. The method includes, using an image processing module, interpolating an updated timing delay calibration for each of a plurality of pixel sensors based at least on an updated set of modulation frequency and duty cycle calibration combinations received by the image processing module, the plurality of pixel sensors coupled to a timing clock, and receiving light generated by a light source and reflected in a 3-dimensional environment, the updated set of modulation frequency and duty cycle calibration combinations replacing the corresponding factory-preloaded timing delay calibrations.
Microsoft Corporation


04/28/16
20160118962 

Signal generating system and signal generating method


A signal generating system for generating an output signal with a 50% duty cycle, comprising: a frequency dividing module, comprising an odd number of level triggering devices, for generating a plurality of frequency divided signals utilizing a frequency dividing ratio equaling to m, wherein the m is an positive integer; and a signal combining module, for combining at least two of the frequency divided signals to generate at least one output combined signal. The signal generating system generates the output signal based on the output combined signal.
Mediatek Inc.


04/28/16
20160118960 

System and calibrating chips in a 3d chip stack architecture


A system and method is disclosed for adaptively adjusting a duty cycle of a signal between a first and second chip in a 3d architecture/stack for adaptively calibrating a chip in a 3d architecture/stack. In one embodiment, the system includes a first chip and a second chip located within the 3d chip stack, wherein the first chip generates a calibration signal, the second chip receives the calibration signal and compares it to a reference signal to generate a comparison signal that further compared to a reference duty signal to generate a reference duty comparison signal, that is then provided to the first chip to generate a drive signal that adjusts a duty cycle of the calibration signal..
Taiwan Semiconductor Manufacturing Co., Ltd.


04/28/16
20160118893 

Circuits and methods providing dead time adjustment at a synchronous buck converter


An apparatus and method are disclosed for efficiently using power at a voltage regulator, such as a synchronous buck converter. The synchronous buck converter includes a first switch and a second switch operated by a first control signal and a second control signal, respectively, where the first and second control signals have a corresponding phase difference.
Qualcomm Incorporated


04/28/16
20160116883 

Power supply superimposing direct current voltage on alternating current voltage and outputting resulting voltage


An alternating current generation circuit has a transformer and generates an alternating current voltage in accordance with a pulse signal input to the transformer. A clamp circuit has a constant-voltage element and a current limit element connected in series between the transformer, an output end of the alternating current voltage, and a ground.
Canon Kabushiki Kaisha


04/21/16
20160113085 

Combined hybrid and local dimming control of light emitting diodes


An led backlight controller combines global/hybrid and local brightness/dimming control for an led backlight illuminator with local regions illuminated by associated led strings. Global/hybrid brightness/dimming control performs hybrid digital modulation control for a predefined lower range of brightness levels, with string current maintained at a substantially constant level associated with a predefined maximum brightness for the lower range (controlling brightness by adjusting digital modulation, such as pwm duty cycle, up to a maximum), and performs hybrid string current control for a predefined higher range of brightness levels (controlling brightness by adjusting string current).

04/21/16
20160112181 

Adaptive harq for half duplex operation for battery and antenna constrained devices


A user equipment (ue) implements improved communication methods which enable uplink (ul) transmissions consistent with an ul timeline. The ue may have a transmit duty cycle and may transmit acknowledge/negative acknowledge messages to a base station according to the transmit duty cycle.

04/21/16
20160112162 

Adaptive harq for half duplex operation for battery and antenna constrained devices


A user equipment (ue) implements improved communication methods which enable uplink (ul) transmissions consistent with an ul timeline. The ue may have a transmit duty cycle and may transmit acknowledge/negative acknowledge messages to a base station according to the transmit duty cycle.



Duty Cycle topics: Duty Cycle, Computer Program, Distributed, Buffer Circuit, Integrated Circuit, Differential Amplifier, Duty Cycle Correction, Ultrasonic, Reference Voltage, Thermostat, Modulation, Wireless Power, Calculator, Control Unit, Bridge Inverter

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