This page is updated frequently with new Duty Cycle-related patent applications.
An improved heating pad which minimizes or eliminates skin burns due to improper uses in one or more of several ways: by monitoring a total electric power input or output of the heating pad; by monitoring an absolute temperature of each surface of the heating pad; by monitoring a temperature difference between each surface of the heating pad, where a small temperature difference indicates that both sides of the heating pad are covered; and/or by monitoring the duty cycle of a heating element, where a large off portion of the duty cycle indicates both sides of the heating pad are covered.. .
Triodyne Safety Systems, L.l.c.
|Method and signaling in dense network operations|
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus identifies first entity and transmits a very low duty cycle signal (ldcs) configuration of the first entity.
|Power conversion apparatus|
A power conversion apparatus including a transformer, a synchronous rectification (sr) transistor and an sr control circuit is provided. A first terminal of a primary side of the transformer receives an input voltage, and a first terminal of a secondary side outputs a dc voltage.
Excelliance Mos Corporation
|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 ioff 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.
Alpha And Omega Semiconductor (cayman) Ltd.
|Photoplethysmography sensor apparatus and method|
The present invention relates to a photoplethysmography sensor apparatus (200, 300), a photoplethysmography sensor method (400), and a photoplethysmography sensor computer program product. It is proposed to measure a photoplethysmographic signal without ambient light interference.
Koninklijke Philips N.v.
A vacuum cleaner may include a cleaner body having a suction motor and a suctioning portion configured to be in communication with the cleaner body and to suction air and dust. One of a battery assembly having a battery or a cord reel assembly having a power cord may be installed in the cleaner body.
Lg Electronics Inc.
|Electronic vaporiser system|
An electronic cigarette vaporiser that includes a heating element, a power source and an electronics module that manages the delivery of power, current or voltage to the heating element; the electronics module controls or delivers pulses of power, current or voltage to the heating element, such as pwm (pulse width modulation) with a high frequency 1-10 khz switching frequency. The duty cycle of the pwm can be approximately 90% when heating; and 1-10% duty during a preheat; and 0% when the vaporiser is idle..
Beyond Twenty Ltd.
|Techniques for using traffic monitoring for co-existence with unlicensed networks|
Systems and techniques are disclosed to manage coexistence of wireless technologies, including 5g unlicensed transmissions, with 802.11 transmissions in the unlicensed band. Aspects of the present disclosure include channel selection and 802.11 traffic monitoring and coordinated access.
|Method and use of simultaneous multiple channels in the dynamic frequency selection band in wireless networks|
The present invention relates to wireless networks and more specifically to systems and methods for selecting available channels free of radar signals from a plurality of 5 ghz radio frequency channels. In one embodiment, the present invention provides a standalone multi-channel dfs master that includes a switch and embedded processor that are programmed to switch a 5 ghz radio transceiver to a first channel of the plurality of 5 ghz radio channels, cause a beacon generator to generate a beacon in the first channel of the plurality of 5 ghz radio channels, cause a radar detector to scan for the radar signal in the first channel of the plurality of 5 ghz radio channel, and then repeat these steps for each of the other channels of the plurality of 5 ghz radio channels during a single beacon transmission duty cycle..
Network Performance Research Group Llc
|Power efficient control and operation of a data-sensing peripheral device based on location and mode of transport|
A peripheral device capable of being worn, carried by a user, or used in an in-vehicle computer system operates in conjunction with an application to acquire, store, and present data relevant to a user's health, physical activity, environment, air quality, or other parameters of interest. For power efficient operation and enhanced performance, control parameters of the peripheral device such as duty cycle, sampling rate, and sleep state may be wirelessly and automatically controlled by the mobile device.
Drayson Technologies (europe) Limited
Apparatuses and methods for phase interpolating clock signals and for providing duty cycle corrected clock signals
Apparatuses and methods for phase interpolating clock signals and for providing duty cycle corrected clock signals are described. An example apparatus includes a clock generator circuit configured to provide first and second clock signals responsive to an input dock signal.
Micron Technology, Inc.
Shift register unit and driving method thereof, as well as array substrate gate drive device and display panel
The present disclosure provides a shift register unit and a driving method thereof, as well as an array substrate gate driving device and a display panel, to decrease a duty cycle of a thin-film transistor connected to the pull-down node in order to prevent the thin-film transistor from aging and increase the lifetime of the thin-film transistor. The shift register unit includes an input module, an output module, a reset module, a function module, a first pull-down module and a second pull-down module; wherein the first pull-down module is configured to provide a low level of the second square wave signal to the pull-up node and the output lead in response to a high level of the first square wave signal and a high level signal at the first pull-down node; the second pull-down module is configured to provide a low level of the first square wave signal to the pull-up node and the output lead in response to a high level of the second square wave signal and the high level signal at the second pull-down node..
Beijing Boe Display Technology Co., Ltd.
Shift register unit, gate driving device and display device
The present disclosure provides a shift register unit including a pull-up module, an input module, a reset module, a first pull-down module, a second pull-down module, a first control module, a second control module, a first state clearing module, and a second state clearing module. The shift register unit utilizes a first clock signal and a second clock signal to cause the first and second pull-down modules to pull down alternately, in order to maintain the stability of the output signal.
Beijing Boe Display Technology Co., Ltd.
Implanted pulse generators with reduced power consumption via signal strength/duration characteristics, and associated systems and methods
Implanted pulse generators with reduced power consumption via signal strength-duration characteristics, and associated systems and methods are disclosed. A representative method for treating a patient in accordance with the disclosed technology includes receiving an input corresponding to an available voltage for an implanted medical device and identifying a signal delivery parameter value of an electrical signal based on a correlation between values of the signal delivery parameter and signal deliver amplitudes.
System for neuroprotective therapy for glaucoma
Providing neuroprotective therapy for glaucoma includes generating a micropulsed laser light beam having parameters and characteristics, including pulse length, power, and duty cycle, selected to create a therapeutic effect with no visible laser lesions or tissue damage to the retina. The laser light beam is applied to retinal and/or foveal tissue of an eye having glaucoma or a risk of glaucoma to create a therapeutic effect to the retinal and/or foveal tissue exposed to the laser light beam without destroying or permanently damaging the retinal and/or foveal tissue and improve function or condition of an optic nerve and/or retinal ganglion cells of the eye..
Ojai Retinal Technology, Llc
Warm dimming for an led light source
A lighting device includes a first led light source having a first color temperature, a second led light source having a second, lower color temperature connected in parallel with the first led light source, and control circuitry operable to apply variable duty cycle frequency modulated power to the first led light source while continuous power is provided to the second led light source. A method of operating a lighting device includes providing variable duty cycle frequency modulated power to a first led light source having a first color temperature, and providing continuous power to a second led light source having a second, lower color temperature connected in parallel with the first led light source..
Ge Lighting Solutions, Llc
Offset insensitive quadrature clock error correction and duty cycle calibration for high-speed clocking
Techniques for correcting clock distortion. The techniques include use of circuitry for detecting and correcting duty cycle distortion and quadrature clock phase distortion.
Dynamic error vector magnitude duty cycle correction
Aspects of this disclosure relate to dynamic error vector magnitude (devm) compensation. In one embodiment, an apparatus includes an amplifier, a low pass filter, and a bias circuit.
Skyworks Solutions, Inc.
Low voltage crystal oscillator (xtal) driver with feedback controlled duty cycling for ultra low power
A low voltage crystal oscillator (xtal) driver with feedback controlled duty cycling for ultra low power biases an amplifier for an xtal in the sub-threshold operating regime. A feedback control scheme can be used to bias the amplifier for an xtal biased in the sub-threshold operating regime.
University Of Virginia Patent Foundation
Multi-reflecting time-of-flight mass spectrometer with axial pulsed converter
Apparatuses (41, 91, 111, 115, 121, 151) and methods (31) for time-of-flight mass spectrometry providing effective pulsed conversion of continuous ion beams into pulsed ion packets is disclosed. Bunching of energetic continuous ion beams forms ion packets, which are filtered by a subsequent isochronous energy filter (49, 79, 81-84, 110).
Thermal management of self-powered power sensors
Apparatus and methods are provided for handling the heating resulting from the operation of a self-powered power sensor (spps). The spps periodically switches between a sense mode and a harvest mode, each contributing to power dissipation that translates into heat, which may become a safety hazard.
Panoramic Power Ltd.
Active waveguide excitation and compensation
An environmental condition may be measured with a sensor (10) including a wire (20) having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies.
Etegent Technologies, Ltd.
Method and system for controlling operation of an engine powered device having cyclical duty cycles
A method of controlling operation of a powered device is provided, comprising determining whether the device is experiencing a cyclical load profile including high load conditions and low load conditions, applying a first power component to the device using an engine, the first power component corresponding to an average power required by the cyclical load profile, and applying a second power component to the device using a motor/generator, a sum of the first power component and the second power component corresponding to a power required by the powered device during the high load conditions.. .
Welding power supply with digital controller
A welding power supply including power conversion circuitry adapted to receive a primary source of power, to utilize one or more power semiconductor switches to chop the primary source of power, and to convert the chopped power to a welding output is provided. The provided welding power supply includes a pulse width modulated (pwm) digital controller including gate drive circuitry that generates a pwm output signal that controls the switching of the one or more power semiconductor switches.
Illinois Tool Works Inc.
Photon modulation management system for stimulation of a desired response in birds
Embodiments described herein provide systems and methods for stimulating a desired response, such as ovulation and egg laying, fertility, hunger, growth, mood and sexual maturity in birds or ayes, by controlling the pulsing of two or more different wavelength bands and cycle, frequency of photon bursts within a photon signal to a bird, where the photon modulation and duty cycle is based upon the specific needs of the bird.. .
Xiant Technologies, Inc.
Current driver, led drive circuit, lighting device and electronic apparatus
A current driver connected with light emitting diode (led) bars of the maximum number n of channels and driving led bars of m channels to be driven, includes: pwm input terminal configured to receive pwm-modulated external dimming pulse having duty cycle with a target light quantity common to the led bars of the m channels; pulse measurement circuit configured to measure period and pulse width of the external dimming pulse and generate digital period data and pulse width data; interface circuit connected to external processor and configured to receive enable data and phase difference setting data; m current sources of the m channels to be driven and respectively connected with corresponding led bars, and configured to be on-and-off-switched in response to internal dimming pulse; and pulse generator configured to generate m internal dimming pulses and distribute the m internal dimming pulses to the m current sources.. .
Rohm Co., Ltd.
Time of flight based passive entry/passive start system
A passive entry-passive start portable device detection system. A portable device includes a transceiver.
Gm Global Technology Operations Llc
Apparatus to implement several high performance phase interpolators are disclosed. Some embodiments are directed to a full-wave integrating phase interpolation core comprising two pairs of in-phase and quadrature-phase current dacs arranged in a cascode architecture to drive an integrating capacitor and produce an interpolation voltage waveform.
Multi-string led driver with current balancing
The present invention discloses a current-source-output light-emitting-diode (led) driver based on lclc circuit to provide a constant output current regardless of variations in led parameters. In the lclc circuit, the number of additional capacitors is scalable with the number of led strings for current balancing.
The Hong Kong Polytechnic University
Signal generator adjusting a duty cycle and semiconductor apparatus using the same
A semiconductor apparatus may include a signal generator, and may operate by receiving two or more external power voltages. The signal generator may include a duty cycle circuit.
Sk Hynix Inc.
Class-d amplifier circuits
Methods and apparatus for class-d amplifier circuits with improved power efficiency. The circuit has an output stage with at least first and second switches and a modulator that receives an input signal to be amplified, sin, and a first clock signal fsw.
Cirrus Logic International Semiconductor Ltd.
Organic light-emitting display device and scan driving circuit thereof
A scan driving circuit includes a plurality of shift register units in cascade connection with each other. Each shift register unit includes a signal input end for receiving a first clock signal, a second clock signal, and an input signal.
Everdisplay Optronics (shanghai) Ltd.
Method and determining a value of a variable parameter
A control methodology and apparatus for an engine suitable for use in capacitor discharge ignition systems for internal combustion engines or brushless dc motors is provided, which make use of a simple logic block to determine for instance an ignition timing advance angle or duty cycle signal based on actual engine speed versus engine control parameter data stored in a table, which is a read-only memory, preferably configurable. To minimise memory space, a small number of values of engine control parameter versus engine speed are stored in the table and the logic block determines the required engine control signal for a measured value of engine speed by an interpolation process, preferably linear interpolation..
Freescale Semiconductor, Inc.
Method and providing welding type power
A method and apparatus for providing welding-type power includes an input circuit, a power circuit, and a controller. The input circuit receives input power and provides intermediate power.
Illinois Tool Works Inc.
Motor control device for estimating temperature of windings, and calculating allowable duty cycle time for machine
A motor control device according to this invention includes a correction unit which calculates a correction coefficient for correcting the temperature of windings, based on the result of a comparison between a winding estimated temperature rise profile representing the temperature of the windings estimated by a winding temperature estimation unit and a winding actual temperature rise profile representing the temperature of the windings measured by a temperature sensor, when a motor as attached to a machine is rotated at a predetermined rotational speed, to match the winding estimated temperature rise profile with the winding actual temperature rise profile, and corrects a temperature rise estimation arithmetic expression using the correction coefficient.. .
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
Open-circuit detection in a switching structure
A power supply device, including: a switching structure for controlling a continuous current in an inductive load on the basis of at least one control signal of a power switch; and anomaly detection elements, generating at least one item of information about the detection of an anomaly of the open circuit type in the wiring from the load to the switching structure. The anomaly detection elements include: elements for measuring the current flowing in the inductive load; elements for comparing the measured current continuously with a threshold value; and elements for counting a time interval during which the measured current remains continuously below the threshold value, delivering the anomaly detection information if the counted time interval>a reference time interval, which is k times greater than a period of the control signal, where k>1, and if the duty cycle of the control signal>a threshold value..
Continental Automotive Gmbh
Lighting device, vehicle illumination device, and vehicle
The lighting device includes a control circuit performing dimming control of dimming a light source device according to a desired dimming level. In the dimming control, the control circuit sets a desired current value of amplitude control to a value corresponding to the desired dimming level, and set a desired duty cycle of pulse width modulation control to a predetermined value associated with a dimming subrange containing the desired dimming level, of multiple different dimming subranges of a total dimming range of the light source device.
Panasonic Intellectual Property Management Co., Ltd.
Low frequency ultrasound device with computer-controlled monitoring
An ultrasound device for therapeutic and aesthetic treatment is disclosed. Different types of hand probes used with the device produce different effects within biological tissues.
Programmable frequency divider providing a fifty-percent duty-cycle output over a range of divide factors
A divider circuit determines whether an input factor (n) is an even number or an odd number. If n is an even number then the input clock is divided by n/2 to generate an intermediate clock.
Aura Semiconductor Pvt. Ltd
Voltage conversion device and operation
A voltage conversion device includes a transformer and at least one transistor. The transformer has a primary side and a secondary side, the secondary side being couplable to a load.
Texas Instruments Incorporated
Power toothbrush with a modulated drive signal
A power toothbrush includes a handle portion having a drive system therein for moving a set of bristles with a frequency and amplitude to produce clinically effective cleaning results. A modulation system modulates the drive signal by changing the frequency or duty cycle of the drive signal with a frequency varying modulation signal.
Koninklijke Philips N.v.
Electrosurgical generator for minimizing neuromuscular stimulation
A system for minimizing neuromuscular stimulation includes a converter, an inverter, and a controller. The converter is configured to output a dc waveform and includes at least one first switching element operated at a first duty cycle.
System and optimizing fundamental frequency modulation for a cascaded multilevel inverter
A system and a method for optimizing fundamental frequency modulation in a cascaded multilevel inverter (cmi) are provided. The cmi includes at least a first h-bridge module and a second h-bridge module connected in series with the first h-bridge module.
Board Of Trustees Of Michigan State University
System and starting a switched-mode power supply
In accordance with an embodiment, a method of operating a switched-mode power supply (smps) includes starting up the switched-mode power supply by determining a rate of increase of a duty cycle of a pulse width modulated (pwm) signal based on an input voltage and a switching frequency of the smps; and generating the pwm signal having the duty cycle in accordance with determined rate of increase.. .
Infineon Technologies Ag
Backlight module and liquid-crystal display device using the same
A backlight module is provided, and includes: a plurality of led strings, each of which is formed from a plurality of leds connected in series and has an led string current flowing through it, and a dimming controller which controls the duty cycle of a voltage pulse wave supplied to each of the led strings, wherein the led string current of each of the led strings multiplied by the duty cycle of the voltage pulse wave for the same led string equals a value, and the error between the values of the led strings is within 6% of any of the values.. .
Duty-cycled high speed clock and data recovery with forward error correction assist
A method and system for duty-cycled high speed clock and data recovery with forward error correction are provided. The system operates on a first digital signal comprising a first plurality of samples and a second digital signal comprising a second plurality of samples.
Method and inverter with thermal management for controlling an electric machine
A temperature estimation module estimates each junction temperature of a corresponding semiconductor device, among a plurality of semiconductor devices, for each phase of an inverter. The temperature estimation module or the data processing system determines a hottest device with a highest junction temperature among the semiconductor devices.
Deere & Company
High voltage direct current system with improved generator excitation
According to one embodiment of the present invention, a variable frequency generator is provided. The variable frequency generator can comprise a main stator comprising multi-phase armature windings and an exciter field winding; and a rotating portion comprising an exciter multi-phase windings, a main field winding, and an amplification component between the exciter windings and the main field winding, wherein the amplification component operates at a variable duty cycle to maintain a phase voltage of the main stator armature windings near independent of a shaft speed of the variable frequency generator..
Hamilton Sundstrand Corporation
Power supplier, power supply system, and voltage adjustment method
A power supplier for generating a supply voltage is provided. The power supplier includes a pwm signal generator, a power conversion circuit, and first and second error amplifiers.