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Duty Cycle patents

      

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




 Pop free auto-chopper patent thumbnailnew patent Pop free auto-chopper
Embodiments described herein provide a method and apparatus for increasing dynamic range. The method begins when a signal is input to a compander and the compander gain of the signal is measured.
Qualcomm Incorporated


 Amplification circuit adjusting duty cycle of output signal and receiver including the same patent thumbnailnew patent Amplification circuit adjusting duty cycle of output signal and receiver including the same
A receiver includes a first stage buffer, a second stage buffer and a third stage buffer. The first stage buffer includes an input portion electrically coupled to a first voltage node, and configured to change a voltage level of an output node in response to an input signal, first and second load portions electrically coupled between a second voltage node and the output node, and electrically coupled to each other and a duty cycle adjustment portion electrically coupled between the first and second load portions, and configured to provide a correction current to the output node through the first load portion..
Sk Hynix Inc.


 Buck power stage with multiple mosfet types patent thumbnailnew patent Buck power stage with multiple mosfet types
A buck voltage converter is disclosed. The buck voltage generator includes a controller configured to generate one or more pulse width modulation (pwm) signals, and a plurality of serially connected switches configured to receive the pwm signals and to generate an output voltage signal at an output terminal based on the received pwm signals.
Empower Semiconductor


 Pulse translation modulation for power converters patent thumbnailnew patent Pulse translation modulation for power converters
A control method is provided for a power converter comprising a switched power stage configured to generate an output voltage from an input voltage according to a pulsed control signal controlling switching of the switched power stage in dependence of a voltage error signal. The voltage error signal is a difference between a reference voltage and the output voltage.
Zentrum Mikroelektronik Dresden Ag


 Pulse width modulation (pwm) driving scheme and bezel reduction patent thumbnailnew patent Pulse width modulation (pwm) driving scheme and bezel reduction
This application sets forth a circuit configuration for a light emitting diode (led) or organic light emitting diode (oled) display. The circuit configuration allows for the pulse-width modulation (pwm) of each emission signal sent to each line of the display.
Apple Inc.


 Thermal mitigation with power duty cycle patent thumbnailnew patent Thermal mitigation with power duty cycle
An apparatus is provided. The apparatus includes a plurality of cores and a temperature sensor configured to monitor a temperature for the cores.
Qualcomm Incorporated


 A communications system, an access network node and a  optimising energy consumed in a communication network patent thumbnailA communications system, an access network node and a optimising energy consumed in a communication network
The access network node includes a control unit operable to estimate a belief on a network condition for a resource limited node of a plurality of resource limited nodes based on network observations and a history profile of the network observations; dynamically update the belief for the resource limited node in the access network node; determine that the severity of the updated belief in the network condition is indicative that a change in sleep duty cycle of the resource limited node is required; determine that correlation between the resource limited nodes within the plurality of resource limited nodes is indicative that a change in sleep duty cycle of the resource limited node is required; and update the sleep duty cycle of the resource limited node to improve or optimize the overall energy consumed in the resource limited nodes while achieving a specific detection threshold.. .
Alcatel Lucent


 Methods and  wireless coexistence based on transceiver chain emphasis patent thumbnailMethods and wireless coexistence based on transceiver chain emphasis
Methods and apparatus for reduction of interference between a plurality of wireless interfaces. In one exemplary embodiment, a device having a first (e.g., wi-fi) interface and a second (e.g., bluetooth) interface monitors interference between its interfaces.
Apple Inc.


 Down-conversion circuit patent thumbnailDown-conversion circuit
A down-conversion circuit for a receiver circuit is disclosed, the down-conversion circuit comprises a first passive switching mixer arranged to down-convert a received radio frequency, rf, signal with a first local oscillator, lo, signal (lo1) having a first duty cycle for generating a first down-converted signal at an output port of the first passive switching mixer. The down-conversion circuit further comprises a second passive switching mixer arranged to down-convert the received rf signal with a second lo signal (lo2) having the same lo frequency as the first lo signal (lo1) and a second duty cycle, different from the first duty cycle, for generating a second down-converted signal at an output port of the second passive switching mixer.
Telefonaktiebolaget Lm Ericsson (publ)


 Clock calibration using asynchronous digital sampling patent thumbnailClock calibration using asynchronous digital sampling
Described is an apparatus which comprises: an asynchronous clock generator to generate an asynchronous clock signal; a digital sampler for sampling a signal using the asynchronous clock signal; a duty cycle corrector (dcc) to receive a differential input clock and to generate a differential output clock, wherein the digital sampler to sample at least one of an output clock from the differential output clock; and a counter to count output of the digital sampler and to provide a control to the dcc to adjust duty cycle of the differential output clock.. .
Intel Corporation


Method and improving a load independent buffer


Described herein are apparatus, system, and method for reducing electrical over-stress of transistors and for generating an output with deterministic duty cycle for load independent buffers. The apparatus comprises a feedback capacitor electrically coupled between an input terminal and an output terminal of a buffer; and a switch, electrically parallel to the feedback capacitor and operable to electrically short the feedback capacitor in response to a control signal, wherein the switch causes a deterministic voltage level on the input terminal..

Fully i/q balanced quadrature radio frequency mixer with low noise and low conversion loss


A method, an apparatus, and a system product for mixing radio frequency signals are provided. In one aspect, the apparatus is configured to perform switching of switches based on first, second, third, and fourth phased half duty clock signals.
Qualcomm Incorporated


Integrated boost asymmetrical half bridge power conversion topology


A method of operating a dc-dc converter includes providing a first error signal to a frequency controller, the first error signal derived from a difference between a discontinuous conduction mode input current and a sinusoidal current reference, providing a second error signal to a duty cycle controller, the second error signal derived from a difference between an output signal and an output reference signal, and combining a frequency signal from the frequency controller and a duty cycle signal from the duty cycle controller to produce a complimentary pulse train for driving the dc-dc converter to both control an input power factor and regulate the output signal.. .
Ge Lighting Solutions, Llc


Continuous current mode multi-load power regulator


Described is an apparatus which comprises: an interconnect to provide current; a bridge having a high-side switch and a low-side switch, wherein the high-side switch and the low-side switch are coupled to an inductor, and wherein the inductor is coupled to the interconnect; a plurality of switching load stages coupled to the interconnect, wherein each of the switching load stages of the plurality to provide a voltage supply to a load; a first controller to control duty cycle of an input to the bridge to regulate the current provided to the interconnect; and a second controller to control duty cycle of a plurality of inputs, each input to be received by a corresponding switching load stage of the plurality of switching load stages.. .
Intel Corporation


Electrical power converter circuits


The preferred embodiments of the present invention changes the switch control mechanisms of switched-mode power converter circuits. Instead of controlling the duty cycle of switch control signals, the preferred embodiments of the present invention controls electrical switches based on the voltage level on the fire line of ac main power source.

Open trap mass spectrometer


An open electrostatic trap mass spectrometer is disclosed for operation with wide and diverging ion packets. Signal on detector is composed of signals corresponding to multiplicity of ion cycles, called multiplets.
Leco Corporation


System and controlling forward/reverse rotation of fan


A control system includes a motor, an interface circuit, a motor controller and a detection control circuit. The interface circuit receives and converts a pulse width modulation signal.
Delta Electronics, Inc.


System and automated open loop fan control


An information handling system includes a pressure transducer and a fan controller. The pressure transducer produces a pressure reading in response to airflow through the information handling system.
Dell Products, Lp


Compact driver for a light emitting diode having an integrated dual output


The current invention relates to a led driver (10) for driving at least two led strings (131, 133) comprising: a dual output power converter (103) for converting an input voltage (vin) into two different output voltages for driving two sets of said at least two led strings (131, 133), a controller (107) for controlling the dual output power converter (103) based on at least one input set point, the dual output converter (103) comprising a switched capacitor converter comprising a plurality of switches, a plurality of capacitors, the outputs of the dual output power converter (103) being connected to internal nodes of the dual power converter (103), the controller (107) being further adapted to deliver pwm output control signals for driving the switches, the duty cycle of which being a function of said at least one input set point. The invention also relates to a lighting system (1) comprising such a driver (10)..
Philips Lighting Holding B.v.


System and managing bandwidth responsive to the duty cycle of an abr client


A scheme for managing bandwidth in a multi-client environment including one or more abr clients and, optionally, one or more non-abr clients. When an abr client enters a sleep phase of its duty cycle, phantom tokens may be issued to simulate full capacity of the network link, wherein phantom packets are used for abr bandwidth calculation.
Ericsson Television Inc.


System and managing bandwidth responsive to the duty cycle of an abr client


A scheme for managing bandwidth in a multi-client environment including one or more abr clients and, optionally, one or more non-abr clients. When an abr client enters a sleep phase of its duty cycle, phantom tokens may be issued to simulate full capacity of the network link, wherein phantom packets are used for abr bandwidth calculation.
Ericsson Television Inc.


Programmable synchronous clock divider


A divided clock signal is generated from an input clock signal. The duty cycle of the divided clock signal is programmed by generating a compare value based on values of duty cycle input and a divide value of the input clock signal.

Increasing pwm resolution for digitally controlled motor control applications


Systems and methods for increasing pulse width modulation (pwm) resolution for digitally controlled motor control applications are described. For example, in some embodiments, a method may include receiving a clock signal having a given period; identifying a target duty cycle; calculating a comparison point based upon the given period and the target duty cycle; generating a pwm signal based upon the clock signal using the comparison point; and varying the comparison point to increase a resolution of an effective duty cycle of the pwm signal..
Texas Instruments Incorporated


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..
Indiana University Research And Technology Corporation


Tunable wireless energy transfer systems


Described herein are improved configurations for a wireless power transfer. A power source for driving a resonator includes a switching amplifier.
Witricity Corporation


Driving pixel circuit and driving device thereof


Embodiments of the present disclosure relate to a technical field of display technology, and provide a driving method for a pixel circuit and a driving device thereof. A problem of cost increase can be solved which is caused by an increase in a number of storages when adjustment is made by way of gamma curve and table lookup, by means of the technical solutions according to embodiments of the present disclosure.
Boe Technology Group Co., Ltd.


Single-shot duty cycle generator for a switched-mode power supply


A switched-mode power supply device includes a power switch configured to transfer power from a supply line to a load in switched-mode; a first oscillator configured to operate at a frequency proportional to a voltage of the supply line; a second oscillator configured to operate at a frequency proportional to a voltage of the load; and a regulator configured to operate the power switch according to a duty cycle based on a ratio between the first and second oscillator frequencies.. .
Stmicroelectronics (grenoble 2) Sas


Duty cycle detection circuit and duty cycle correction circuit including the same


A duty cycle detection circuit includes a reset unit suitable for resetting a first capacitor and a second capacitor based on a reset signal, a first charging/discharging unit suitable for charging the first capacitor while a clock is in a first level and discharging the first capacitor while the clock is in a second level, a second charging/discharging unit suitable for charging the second capacitor while the clock is in the second level and discharging the second capacitor while the clock is in the first level, and a differential amplifier suitable for amplifying a voltage difference between the first capacitor and the second capacitor based on an amplification enable signal and generating a detection signal as a result of the amplification.. .
Sk Hynix Inc.


Forwarded clock jitter reduction


In some embodiments, a differential amplifier with duty cycle correction is provided.. .
Intel Corporation


Dynamic operating frequency control of a buck power converter having a variable voltage output


A switch controller for a variable output voltage power converter includes a pulse width modulator (pwm) output producing a pulsed signal for driving a power converter switch. A mode selector output is connected to a multiplier.
Astec International Limited


Systems and methods for remotely controlling a wall socket


A system permits wirelessly controlling the duty cycle of alternating current at a wall electrical outlet (152) remote from a wall electrical outlet (144) which is controlled by a wall switch (142).. .
E5 Global Innovations, Inc.


Operationally optimized renewable electrical energy power system


A renewable electrical energy power system is provided with aspects and circuitry that can optimize operation of a dc-ac inverter. Alternative electrical energy sources may include solar cells and solar panels.
Ampt, Llc


Sine wave oscillator and inductive sensors


A sine wave oscillator for an inductive sensor system is disclosed. The sine wave oscillator comprises a decoupler and a low-pass filter, wherein the decoupler is configured to provide a pulse width modulated signal as a decoupled signal at one output of the decoupler.
Zf Friedrichshafen Ag


Light emitting diode driver having a logic unit for generating a frequency control signal


A light-emitting diode driver includes a power switch, a logic unit and a pulse adjustment signal generator. The power switch is used to control a charging level of a light-emitting diode voltage terminal, and controlled to be turned on or off by a pulse-width modulation signal.
Au Optronics Corp.


Power-compensated fusion furnace


A power-compensated fusion furnace includes a power control system having one switching device per heating element, power measurement circuitry, a master temperature sensor, and a controller. Each switching device is electrically connected to a respective heating element.
Spex Sample Prep Llc


Method for operating a power-compensated fusion furnace


A method for operating a power-compensated fusion furnace that includes a power control system having one switching device per heating element, power measurement circuitry, a master temperature sensor, and a controller. Each switching device is electrically connected to a respective heating element.
Spex Sample Prep Llc


Light 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.


Light-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


Managing 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.


Method 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


Power 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


Low 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


Method 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.


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


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.


Implantable 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


Method 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.


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.


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


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.


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


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


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.


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


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


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


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..

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..

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.

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.

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.

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.

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.

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.

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.

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.

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.. .

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.. .

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.

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.

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.

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..

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.. .

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..

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..

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.

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.


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.


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


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.


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


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.


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


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


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


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


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


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


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.


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.


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)


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.


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.


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.


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


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


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.


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.




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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