FreshPatents.com Logo
Enter keywords:  

Track companies' patents here: Public Companies RSS Feeds | RSS Feed Home Page
Popular terms

[SEARCH]

Pulse Width Modulation topics
Pulse Width Modulation
Modulation
Bridge Inverter
Duty Cycle
Control Unit
Ion Source
Illumination Source
Constant Current Source
Level Shift
Motor Control
Buck Boost
Capacitive Touch Sensor
Transmitter
Capacitive Touch
Reference Voltage

Follow us on Twitter
twitter icon@FreshPatents

Web & Computing
Cloud Computing
Ecommerce
Search patents
Smartphone patents
Social Media patents
Video patents
Website patents
Web Server
Android patents
Copyright patents
Database patents
Programming patents
Wearable Computing
Webcam patents

Web Companies
Apple patents
Google patents
Adobe patents
Ebay patents
Oracle patents
Yahoo patents

[SEARCH]

Pulse Width Modulation patents



      
           
This page is updated frequently with new Pulse Width Modulation-related patent applications. Subscribe to the Pulse Width Modulation RSS feed to automatically get the update: related Pulse RSS feeds. RSS updates for this page: Pulse Width Modulation RSS RSS


Date/App# patent app List of recent Pulse Width Modulation-related patents
04/23/15
20150110299
 Method and device for driving digital speaker based on code conversion patent thumbnailnew patent Method and device for driving digital speaker based on code conversion
A method and device for driving a digital speaker based on code conversion are provided in the invention. The method comprises the steps of: (1) converting input format; (2) performing multi-bit Σ-Δ modulation; (3) thermometer code conversion; (4) dynamic mismatch-shaping processing; (5) pulse width modulation code conversion; and (6) controlling on/off status switching of the mosfet of a full-bridge power amplification network to drive a digital speaker load sound.
Suzhou Sonavox Electronics Co., Ltd.
04/23/15
20150109044
 Variable amplitude signal generators for generating a sinusoidal signal having limited direct current (dc) offset variation, and related devices, systems, and methods patent thumbnailnew patent Variable amplitude signal generators for generating a sinusoidal signal having limited direct current (dc) offset variation, and related devices, systems, and methods
Embodiments disclosed include variable amplitude signal generators for generating a sinusoidal signal having limited direct current (dc) offset variation and related devices and methods. Instead of employing a single pulse width modulation (pwm) signal to generate a sinusoidal signal, in one embodiment, a circuit is provided that generates two pwm signals.
Corning Mobileaccess Ltd.
04/23/15
20150108919
 Light source circuitry patent thumbnailnew patent Light source circuitry
Light source circuitry comprises a first group of one or more light emitting diodes operable to emit light of a first color, a second group of one or more light emitting diodes operable to emit light of a second color, and a third group of one or more light emitting diodes operable to emit light of a third color, wherein the first, second and third groups of light emitting diodes are arranged such that, when a fixed current arrives at the light source circuitry, the fixed current is shared between the first, second and third groups, and wherein the circuitry is configured such that a proportion of the fixed current that flows through each of the first and second groups is controllable in dependence on a received control signal and such that the remainder of the fixed current flows through the third group. The light source circuitry allows the chromaticity of the combined light emissions of the light source circuitry to be varied gradually across a range using a single control signal and also without requiring the use of pulse width modulation (pwm).
Koninklijke Philips N.v.
04/16/15
20150105766
 Radiofrequency amplifier impedance optimization patent thumbnailRadiofrequency amplifier impedance optimization
The present disclosure is directed to an electrosurgical generator including a resonant inverter having an h-bridge and a tank. The generator also includes a pulse width modulation (pwm) controller configured to output pwm timing signals to the h-bridge.
Covidien Lp
04/16/15
20150103877
 Electro-magnetic interference reduction for switched signal systems patent thumbnailElectro-magnetic interference reduction for switched signal systems
In one embodiment, a method receives a pulse width modulation signal. A value that is a function of the pulse width modulation signal is determined.
Marvell World Trade Ltd.
04/16/15
20150102753
 Method and system for controlling motor of environmentally-friendly vehicle patent thumbnailMethod and system for controlling motor of environmentally-friendly vehicle
A method and system for controlling a vehicle motor are provided. The system includes an inverter that controls the motor to receive a torque command from an external system and output a torque based on the torque command.
Hyundai Motor Company
04/16/15
20150102736
 Controlling device for led decorative lights, a led light and a controlling  led decorative lights patent thumbnailControlling device for led decorative lights, a led light and a controlling led decorative lights
The present invention discloses a controlling device for led decorative lights, a led decorative light and a controlling method for led decorative lights. A controlling device for led decorative lights includes a power inverting module, a multi-mode controlling signal emitting module being coupled with the said power inverting module.
04/09/15
20150100173
 Method and device for wifi controller electric switch patent thumbnailMethod and device for wifi controller electric switch
Disclosed is a wifi connected power outlet, or devices controlled by wifi devices. A relay, solid state switch, or other is used to reversibly connect devices to the mains power, optionally implementing pulse width modulation, voltage modulation, or other means for continuously varying power delivered to a load.
04/02/15
20150091493
 Using pulse width modulation in a single phase drive system patent thumbnailUsing pulse width modulation in a single phase drive system
Embodiments herein disclose a method for enabling operation of a single phase induction motor, the method comprising applying space vector pulse width modulation (pwm) to the single phase induction motor; determining pulse width using location of the space vector associated with space vector pwm; and enhancing voltage levels of the single phase induction motor for a particular dc bus voltage using the determined pulse width and the location of the space vector.. .
Tribi Systems Private Limited, Company
03/26/15
20150086185
 Pulse width modulated multiple heater control patent thumbnailPulse width modulated multiple heater control
A system includes, in one example, a first heater device, a second heater device, and a temperature sensor, each disposed within a fluid flow. The system further includes a controller communicatively coupled to the first heater device, the second heater device, and the temperature sensor.
Hamilton Sundstrand Corporation
03/26/15
20150085541

Multi-level inverter and power supply system


A multi-level inverter includes two n-level inverter units with pulse width modulation waves staggered by a phase of 180 degrees, and n is an integer greater than or equal to 3; a direct current power source module, where an output end thereof is connected to input ends of the two n-level inverter units; a transformer, where the transformer includes a primary side and a secondary side, an inductor of the primary side and an inductor of the secondary side are coupled, and one end of the inductor of the primary side and one end of the inductor of the secondary side are connected to output ends of the two n-level inverter units respectively. The two n-level inverter units are reversely coupled, and the other end of the inductor of the primary side and the other end of the inductor of the secondary side are connected..
Huawei Technologies Co., Ltd.
03/26/15
20150084556

Motor driving method and operating method thereof


Provided is a motor driving circuit which transmits a driving signal to a motor, including a gate driver generating the driving signal corresponding to a pulse width modulation signal, a pulse width modulation signal generator generating the pulse width modulation signal according to hall sensor signals received from hall sensors mounted in the motor, a current sensor measuring a link current provided to the gate driver, a low pass filter outputting a filter current that high frequency components are removed from the measured link current, and a minimum power consumption estimating unit generating a lead angle according to a start signal with reference to the filter current, wherein the pulse with modulating signal is changed according to the lead angle.. .
Electronics And Telecommunications Research Institute
03/26/15
20150084554

Electric power tool


An electric power tool includes a rechargeable battery, a motor, a detector that detects a parameter that affects a voltage drop of the rechargeable battery and outputs a detection signal corresponding to the detected parameter, a controller that receives the detection signal and generates a control signal in accordance with the detection signal, and a power switching unit operated in accordance with the control signal from the controller to switch between a situation in which the rechargeable battery supplies electric power to the motor and a situation in which the rechargeable battery stops supplying electric power to the motor. The controller controls the power switching unit using a pulse width modulation (pwm) control signal when the electric power tool is activated.
Panasonic Corporation
03/19/15
20150079533

Software to control vibration


A processor containing software allowing for measuring the speed of a motor, and adjusting that speed by pulse width modulation is provided. A dedicated voltage limiter prevents excess speed, and a battery charge management controller to charge the battery and monitor the battery charge status, ensures battery voltage is regulated to 3.3 v.
Orthoaccel Technologies Inc.
03/19/15
20150078036

Power converters for wide input or output voltage range and control methods thereof


A power converter topology is adapted for efficiency according to input voltage, output voltage or output current conditions. Topology adaptation is achieved by control responsive to the input and output operating conditions, or to one or more external control signals.
Delta Electronics, Inc.
03/19/15
20150077083

Ramp signal generating method and generator thereof, and pulse width modulation signal generator


A ramp signal generating method and a generator thereof, and a pulse width modulation signal generator are provided. The ramp signal generating method includes following steps: receiving an error signal, wherein the error signal relates to an output voltage of a power converter; generating an error delayed signal according to the error signal; and providing a ramp signal according to the error signal and the error delayed signal.
Upi Semiconductor Corp.
03/19/15
20150077082

Apparatus and a boost converter with improved electrical overstress (eos) tolerance


An apparatus and method for a boost power converter with improved electrical overstress (eos) tolerance is disclosed. A boost power converter provides a providing a pulse width modulation (pwm) boost power converter with an electrical overstress (eos) boost over-voltage comparator/switch network comprises a boost power converter, a boost overvoltage comparator, a boost overvoltage comparator feedback network, and a boost overvoltage switch.
Dialog Semiconductor Gmbh
03/19/15
20150076999

Modifying duty cycles of pwm drive signals to compensate for led driver mismatches in a multi-channel led system


An led (light emitting diode) controller comprises a first led driver to generate a first pwm (pulse width modulation) drive signal to turn on or turn off, respectively, a first current through a first led string. Additionally, the led controller comprises a compensation circuit to generate the first pwm drive signal responsive to a first duty set signals.
Dialog Semiconductor Inc.
03/19/15
20150076210

Torque optimization for surgical instruments


A control system having speed management control. The control system can be in signal communication with a battery, and the battery can be coupled to a motor.
Ethicon Endo-surgery, Inc.
03/19/15
20150076209

Torque optimization for surgical instruments


A control system having speed management control. The control system can be in signal communication with a battery, and the battery can be coupled to a motor.
Ethicon Endo-surgery, Inc.
03/19/15
20150076002

Apparatus and treating aqueous solutions and contaminants therein


The present disclosure is generally directed to devices and methods of treating aqueous solutions to help remove or otherwise reduce levels, concentrations or amounts of one or more contaminants. The present disclosure relates to a method of which includes the application of a constant current or a pulse width modulation duty cycle to at least one counterelectrode (e.g.
Aquamost, Inc.
03/12/15
20150071338

Switched-mode high-linearity transmitter using pulse width modulation


A qam transmitter is disclosed that may reduce the frequency of local clock signals and/or reduce the switching frequency of driver circuits when generating a qam output signal for transmission. The qam transmitter may generate a number of pwm signals indicative of in-phase (i) and quadrature (q) signal components, and then use one or more selected even-order harmonics of the pwm signals to generate the qam output signal.
Qualcomm Incorporated
03/12/15
20150070943

High efficiency zero-voltage switching (zvs) assistance circuit for power converter


A system includes a power converter configured to convert input power into output power. The power converter includes first and second converter bridges, where each converter bridge includes multiple transistors.
Raytheon Company
03/12/15
20150069984

Buck converter with overshoot protection


A buck converter includes a pulse width modulation unit, a first switch, a second switch, an inductance, and a sensor near the inductance. The pulse width modulation unit controls the first switch and the second switch power to allow or disallow electrical conduction.
Hon Hai Precision Industry Co., Ltd.
03/12/15
20150069951

Multimode battery charger


A multimode battery charger circuit supporting switch mode and linear mode charging operations. In various embodiments, the multimode battery charging circuit includes mode control circuitry, a linear gate driver, a pulse width modulation (pwm) control circuit, a programmable constant current control loop circuit, and a programmable constant voltage control loop circuit.
Broadcom Corporation
03/12/15
20150069942

Tri-stating brushless dc motor phase for direct detection of back emf zero cross


A back electromotive force (bemf) zero cross may be detected in a brushless direct current (bldc) motor that is controlled by pulse width modulation (pwm). A phase input of the bldc motor is tri-stated during pwm periods in which the phase input conducts motor drive current, and the tri-stating of the phase input is used to determine whether a bemf zero cross has occurred in the bldc motor..
Texas Instruments Incorporated
03/05/15
20150063417

Temperature sensing circuit for igbt module


A temperature sensing circuit for an insulated gate bipolar transistor (igbt) module, which enables a temperature of the igbt module to be sensed by a pulse width modulation (pwm) method, using a photo coupler, etc., is provided. In the temperature sensing circuit for the igbt module, a voltage value between both terminals of a diode is measured, the measured voltage value is converted into a digital signal, using a pulse width modulation (pwm) technique, and the converted digital signal is easily transmitted to a controller such as a microcomputer (micom), using a photo coupler for electrical insulation, so that it is possible to analyze the duty of the digital signal, thereby sensing an accurate temperature..
Hyundai Motor Company
03/05/15
20150062988

Hybrid zero-voltage switching (zvs) control for power inverters


A power inverter combination includes a half-bridge power inverter including first and second semiconductor power switches receiving input power having an intermediate node therebetween providing an inductor current through an inductor. A controller includes input comparison circuitry receiving the inductor current having outputs coupled to first inputs of pulse width modulation (pwm) generation circuitry, and a predictive control block having an output coupled to second inputs of the pwm generation circuitry.
University Of Central Florida Research Foundation, Inc.
03/05/15
20150061616

Switching power voltage regulator


A switching power voltage regulator includes a pulse width modulation (pwm) signal generator, an output circuit and a feedback circuit. The pwm signal generator is configured to generate a pwm signal.
Fitipower Integrated Technology, Inc.
03/05/15
20150061604

Wireless charging circuit and abnormal state protection circuit thereof


A wireless charging circuit and an abnormal state protection circuit thereof is provided in the present invention. The wireless charging circuit includes a power converter, a resonant circuit and an abnormal state protection circuit.
Generalplus Technology Inc.
03/05/15
20150061561

Motor control device


The motor control device is an electric motor control device including a control unit (control circuit unit) configured to output a forward-rotation command or a reverse-rotation command to the electric motor. The control unit includes a position detector (door opening/closing information generation circuit) configured to detect a rotation direction of the electric motor when a detection signal is input from a rotation sensor (hall integrated circuit (ic)), which detects the rotation of the electric motor, while no current is supplied to the electric motor.
Mitsuba Corporation
03/05/15
20150061522

Method and calculating an average value of an inaccessible current from an acessible current


In a power converter, a circuit determines an average value of an inaccessible current from an average value of an accessible current and a value of the operating duty cycle of the converter. A method of measuring an average value of an inaccessible current from a measured value of a current in a power converter by a duty cycle of a pulse width modulation (pwm) signal representing a duty cycle of the power converter.
Texas Instruments Incorporated
03/05/15
20150061521

Method and calculating an average value of an inaccessible current from an acessible current


In a power converter, a circuit determines an average value of an inaccessible current from an average value of an accessible current and a value of the operating duty cycle of the converter. A method of measuring an average value of an inaccessible current from a measured value of a current in a power converter by a duty cycle of a pulse width modulation (pwm) signal representing a duty cycle of the power converter.
Texas Instruments Incorporated
02/26/15
20150055943

Apparatus for providing transient thermal profile processing on a moving substrate


A method and apparatus for thermally processing material on a low-temperature substrate using pulsed light from a flash lamp is disclosed. Material is conveyed past the flash lamp.
Ncc Nano, Llc
02/26/15
20150055696

Communication system


A communication system performs communication using a pulse width modulation code as a transmission code. The communication system includes a plurality of nodes that are connected via a transmission line to be capable of communicating with each other.
Denso Corporation
02/26/15
20150054859

Driving circuit and driving light emitting diode and display apparatus using the same


The present invention provides a driving circuit and a driving method for light-emitting diodes (leds), and a display apparatus using the same. The driving circuit comprises a power switch and a dimmer circuit.
Shenzhen China Star Optoelectronics Technology Co., Ltd.
02/26/15
20150054553

Pulse width modulation circuit and voltage-feedback class-d amplifier circuit


The frequency characteristic of a voltage-feedback class-d amplifier circuit for driving an output load is improved. A triangular-wave correction circuit which compensates a gradient of a triangular wave is provided to a triangular-wave signal generator which supplies a triangular wave signal used as a pwm carrier to a comparison circuit for performing pwm modulation of an input signal.
Renesas Electronics Corporation
02/26/15
20150054430

Method and circuit arrangement for limiting peak currents and the slope of the current edges


A method for limiting peak currents, particularly depending on a charge quantity provided by a voltage source, and the maximum pitch of the current flanks of an electric motor for an electrohydraulic motor vehicle brake system, particularly a pump motor, controlled by pulse width modulation, wherein a change to an actual duty cycle of the pwm is made by a first duty cycle of the pwm on a second duty cycle at runtime, wherein the change takes place according to a positive or negative pitch value calculated and/or changeable at runtime. The invention further describes an electronic circuit arrangement for the implementation of a method for limiting peak currents and the maximum pitch of current flanks..
Continental Teves Ag & Co. Ohg
02/26/15
20150053746

Torque optimization for surgical instruments


A control system having speed management control. The control system can be in signal communication with a battery, and the battery can be coupled to a motor.
Ethicon Endo-surgery, Inc.
02/26/15
20150052905

Pulse width modulation for control of late lean liquid injection velocity


Systems and methods for pulse-width modulation of late lean liquid injection velocity can be provided by certain embodiments of the disclosure. In one embodiment, a gas turbine combustor utilizing a late lean injection scheme can be provided, wherein the combustor can include a combustor liner and a transition piece.
General Electric Company
02/19/15
20150049519

Single switch infinite-level power inverters


An electrical power converter includes a circuit with a single switching transistor that is electrically connected to a direct current power source, a first inductor-capacitor (lc) circuit electrically connected to the single switching transistor, a second lc circuit electrically connected to the first lc circuit and configured to provide an output signal to a load. A controller is operatively connected to the single switching transistor.
Indiana University Research & Technology Corporation
02/19/15
20150048805

Power conversion apparatus and control method thereof


An ac/dc conversion circuit of a power conversion apparatus receives an ac signal and has a switching element. A voltage sensing circuit generates a voltage reference signal according to an ac voltage signal.
National Cheng Kung University
02/19/15
20150048771

Method and device for controlling a motor vehicle windscreen wiper motor


Method of controlling a motor vehicle windscreen wiper motor, powered and controlled by pulse width modulation (pwm) with duty ratio (t) of determined value, in which the instantaneous fundamental period of the modulated pulses is switched successively between at least two discrete period values (t1, t2), the duty ratio (t) of the pulses (pwm) being substantially established at a determined value for at least one determined duration (tc) of switching of the modulated pulses. Application to the reduction of the emc noise level in the radio frequency bands to be protected..
Valeo Systèmes D'essuyage
02/19/15
20150048769

Motor control system and method


A motor control system is disclosed. The motor control system includes a level-shifting unit, a motor unit and a control unit.
Delta Electronics, Inc.
02/19/15
20150048765

Apparatus of controlling vehicle provided with motor and control method thereof


An apparatus for controlling a vehicle provided with a motor includes a current command generator that determines first and second axes currents according to driving conditions, and a current controller that generates first and second axes voltages by using the first and second axes currents and feedback currents. An axis converter converts the first and second axes voltages into 3-phase voltages, 3-phase feedback currents into first and second axes feedback currents, and transmits the same to the current controller.
Hyundai Motor Company
02/05/15
20150036404

Converter controller with half bridge adaptive dead time circuit and method


The present disclosure relates to a controller, a circuit and method for controlling a power converter using pulse width modulation (pwm). At least one logic block (13, 15, 16) of the controller is configured to remove a command (4) which is configured to control the other power semiconductor switch (2) in a half-bridge (1,2) so that the other power semiconductor switch (2) remains in a non-conductive state while an antiparallel diode (6) allows an electric current (5) to pass in one direction, called the diode's forward direction, while blocking current in the opposite direction.
American Power Conversion Corporation
02/05/15
20150035511

Low power switching mode regulator having automatic pfm and pwm operation


A circuit and method for operating a switching mode power supply. A clock is driven by a current source to generate pulses at a fixed frequency using pulse width modulation for normal load demands.
Texas Instruments Incorporated
02/05/15
20150035509

Control circuit and dc-dc converter


To provide a control circuit in a dc-dc converter, which includes transistors with the same conductivity type. The control circuit generates a pulse signal (gs), and includes a hysteresis comparator, a logic unit, a digital-analog converter circuit, and a comparator.
Semiconductor Energy Laboratory Co., Ltd.
02/05/15
20150035363

Performance and isolation improvements for digitally controlled ac attenuation and protection circuits


A protection and attenuation circuit for sensitive ac loads is described. The circuit provides ac power protection and attenuation utilizing high-efficiency switch-mode techniques to attenuate an ac power signal by incorporating a bidirectional, transistorized switch driven from a pulse width modulation signal, pwm.
Butler Engineering Llc
01/29/15
20150033041

Power supply circuit for central processing unit


A power supply circuit applied to a central processing unit (cpu) of a computer includes a pulse width modulation (pwm) controller, a control circuit, a first switch circuit, a second switch circuit, a first compensation circuit, a second compensation circuit, a first power circuit, and a second power circuit. When the computer is turned on, the pwm controller regulates duty cycles of pulse signals and outputs the regulated pulse signals to the first and second power circuits according to a first compensation signal, to provide a stable voltage to the cpu.
Hon Hai Precision Industry Co., Ltd.
01/29/15
20150033040

Power supply circuit for central processing unit


A power supply circuit for supplying power to a central processing unit (cpu) of a computer includes a pulse width modulation (pwm) controller, a control circuit, a switch circuit, a first current protection circuit, a second current protection circuit, a first power circuit, and a second power circuit. When the computer is turned on, a first current protection threshold is set by the pwm controller through the first current protection circuit.
Hon Hai Precision Industry Co., Ltd.
01/29/15
20150032096

Systems and methods for generating electrosurgical energy using a multistage power converter


The electrosurgical systems and methods according to the present disclosure use a multi-stage power converter for generating electrosurgical energy. The electrosurgical systems include an electrosurgical generator having a power converter coupled to an electrical energy source and configured to generate electrosurgical energy.
Covidien Lp
01/29/15
20150028840

Control of an inductive load by pulse width modulation


Method and device for controlling an inductive load by pulse width modulation, on the basis of a periodic set point control signal having a given set point duty cycle. The set point control signal is, in each period of the set point control signal, in a first logic state determined from the high and low logic states for at least a first duration, and is in the other logic state during the rest of the period.
Continental Automotive France
01/29/15
20150028830

Current-mode buck converter and electronic system using the same


A current-mode buck converter is disclosed, wherein the current-mode buck converter operates in a pulse width modulation (pwm) mode or a pulse frequency modulation (pfm) mode. When the current-mode buck converter enters into the pfm mode, the voltage level of the parking voltage is maintained at the voltage level of compensation voltage, so as to decrease switch loss of the current-mode buck converter operating between pwm mode and pfm mode, and stabilize the output voltage of the current-mode buck converter..
Anpec Electronics Corporation
01/29/15
20150028787

Conveyance cart


A conveyance cart includes: a body frame; a deck provided liftably against the body frame to load a burden; an electric actuator electrically driven to expand or contract to lift or lower the deck; a current detection element that detects an electric current value supplied to the electric actuator; and a pwm control element that drives the electric actuator in a pulse width modulation (pwm) control manner. The pwm control element increases an on-duty ratio input to the electric actuator if the electric current value detected by the current detection element exceeds a setting value when the deck is lifted..
Kayaba Industry Co., Ltd.
01/22/15
20150024509

Method and measuring chemical ion concentration using a feedback- controlled titrator


There is provided a method and device for measuring an ion concentration of a sample. The method comprises exposing a chemical sensor to the sample to provide an electrical output signal 5 representing said ion concentration and controlling a titrator exposed to the sample to release or absorb a quantity of ions to the sample.
Dna Electronics Ltd.
01/22/15
20150022165

Switching power supply device and pulse width modulation circuit used therein


A problem of the present invention is to provide a switching power supply device and a pulse width modulation circuit capable of operating stably in synchronization with a clock signal. To solve the problem, a pulse width modulation circuit 3a in a switching power supply device 1a includes square-wave voltage output means 8a for, when an integrated voltage vn rises to an upper threshold voltage or more, shifting a square-wave voltage vpwm to l level, or when the voltage vn drops to a lower threshold voltage or less, shifting the voltage vpwm to h level, and clock means 6a for outputting a first clock signal vcl1 and a second clock signal vcl2, which are 180° out of phase from each other.
Oita University
01/15/15
20150019883

Power supply circuit for central processing unit


A power supply circuit for a central processing unit (cpu) includes a comparing circuit, first to third switch circuits, first and second compensation circuits, a pulse width modulation (pwm) controller, a first power circuit connected to a first output pin of the pwm controller, and a second power circuit connected to a second output pin of the pwm controller. When a motherboard operates normally, the comparing circuit outputs a first control signal to control the first and third switch circuits to be turned on.
Hong Fu Jin Precision Industry (shenzhen) Co., Ltd.
01/15/15
20150016170

Method for controlling a multiphase converter


A method for controlling a polyphase inverter that includes a number of half bridges connected into an intermediate voltage circuit and center taps between switching elements. By cyclically switching the switching elements, the respective center taps of the half bridges are connected to an upper intermediate circuit rail or to a lower intermediate circuit rail of the intermediate voltage circuit according to the principle of pulse width modulation.
Diehl Ako Stiftung & Co. Kg
01/15/15
20150016162

Photovoltaic inverter with swinging line filter inductors


The invention is a high efficiency single-phase or poly-phase dc-to-ac power converter apparatus and power conversion method which includes a line filter inductor or line filter inductors to integrate or filter pulse modulated waveforms into substantially sinusoidal waveforms wherein (i) the line filter inductor or inductors have inductance values that swing substantially from zero current to peak rated current and (ii) a pulse width modulation technique is used that varies both pulse width modulation duty cycles and periods as a function of the predicted instantaneous line filter inductance and the predicted di/dt across the line filter inductor or inductors in order to minimize power converter switching losses while maintaining ac power quality. With the invention, substantial cec power conversion efficiency enhancements should be achievable and with an overall reduction in power converter parts cost..
Renewable Power Conversion, Inc.
01/15/15
20150016004

Over-current protection circuit


A circuit protecting the components of a power circuit against passing an over-current is connected to an enable terminal of a pulse width modulation (pwm) controller of a power supply circuit on a motherboard, protecting the field effect transistors (fets) of a first power circuit of the power supply circuit. The protecting circuit includes a first protection circuit.
Hon Hai Precision Industry Co., Ltd.
01/15/15
20150015426

Signal conversion system and method


A signal conversion system and method for converting an input signal to a pulse width modulated signal is disclosed. The signal conversion system includes a sample rate converter coupled with an associated pulse width modulation (pwm) module.
Actiwave Ab
01/15/15
20150015220

Control for switching between pwm and pfm operation in a buck converter


Mode control circuitry is disclosed for use in a buck switching voltage regulator capable of operating in a pulse width modulation (pwm) mode and a pulse frequency modulation (pfm) mode, with the regulator including an inductor having first and second opposite inductor terminals, a first transistor switch connected between the first inductor terminal and a power input terminal and a second transistor switch connected between the first inductor terminal and a circuit common. Current sensing circuitry is provided to sense inductor current through the second switching transistor when the second switching transistor is switched to an on state and to produce a current sense signal which is integrated over time starting when the second switching transistor is switched to an on state and to produce a sense signal.
Texas Instruments Incorporated
01/15/15
20150015156

Signal transmission method and related device


A method of operating an electrical power supply device having a primary side and a secondary side is provided. The method includes transmitting with an optocoupler arranged between the primary side and the secondary side a wide band control signal and a numerical information signal.
Osram Gmbh


Popular terms: [SEARCH]

Pulse Width Modulation topics: Pulse Width Modulation, Modulation, Bridge Inverter, Duty Cycle, Control Unit, Ion Source, Illumination Source, Constant Current Source, Level Shift, Motor Control, Buck Boost, Capacitive Touch Sensor, Transmitter, Capacitive Touch, Reference Voltage

Follow us on Twitter
twitter icon@FreshPatents

###

This listing is a sample listing of patent applications related to Pulse Width Modulation for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Pulse Width Modulation with additional patents listed. Browse our RSS directory or Search for other possible listings.
     SHARE
  
         











0.5784

4115

0 - 1 - 71