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Pulse Width Modulation

Pulse Width Modulation-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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NEW Amplitude limiting oscillation circuit
Shenzhen Goodix Technology Co., Ltd.
May 17, 2018 - N°20180138860

An amplitude limiting oscillation circuit (100) is disclosed. The amplitude limiting oscillation circuit (100) includes: an oscillation circuit (110), configured to generate an oscillation signal; a pulse width modulation circuit (120), configured to generate a pulse width modulation signal according to an amplitude of the oscillation signal; a low pass filtering circuit (130), configured to convert the pulse width modulation signal into a direct current ...
NEW Semiconductor device and system
Samsung Electronics Co., Ltd.
May 17, 2018 - N°20180138806

A semiconductor device includes an inductor selectively connected to a power supply voltage and configured to store and release energy; a first transistor connected between the power supply voltage and the inductor and configured to provide the power supply voltage to the inductor; a second transistor connected to the first transistor in series, connected between the inductor and a ground ...
NEW Induction-based aerosol delivery device
Rai Strategic Holdings, Inc.
May 17, 2018 - N°20180132531

An aerosol delivery device is provided that includes a substrate configured to carry an aerosol precursor composition, and a resonant transformer including a transmitter coupling device and a resonant receiver coupling device that is positioned in proximity to the substrate. The aerosol delivery device also includes a pulse width modulation (pwm) inverter configured to drive the resonant transformer. The pwm ...
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Multi-stage power converter and control method thereof
Delta Electronics, Inc.
May 10, 2018 - N°20180131279

A multi-stage power converter includes a first-stage power conversion circuit, a second-stage power conversion circuit, a second-stage analogic sampler, a pulse width modulator, a first isolator, a pulse width analyzer and a control unit. The second-stage analogic sampler samples power parameter from the second-stage power conversion circuit. The pulse width modulator converts the power parameter into a pulse width modulation ...
Systems and methods for generating electrosurgical energy using a multistage power converter
Covidien Lp
May 10, 2018 - N°20180125564

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. The power converter includes a boost converter configured to convert a first direct current from the electrical energy ...
Converter and display apparatus including the same
Samsung Display Co., Ltd.
May 03, 2018 - N°20180122293

A converter includes a phase locked loop (“pll”) unit which outputs a first frequency signal having a first frequency during a first period of one frame and to output a second frequency signal modulated to have a frequency corresponding to a pattern of an image signal during a second period other than the first period, a ...
Pulse Width Modulation Patent Pack
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Pulse Width Modulation Patent Applications
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  • 123+ full patent PDF documents of Pulse Width Modulation-related inventions.
  • Exact USPTO filing data with full-text, images, drawings & claims.
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Voltage regulator circuit and control method therefor
Wistron Corporation
May 03, 2018 - N°20180120878

A voltage regulator circuit and a control method therefor are provided. A voltage regulator circuit includes a switching pulse width modulation (pwm) voltage regulation control integrated chip (ic), a first switch, a second switch, and a voltage detector. The switching pwm voltage regulation control ic includes a low-dropout (ldo) regulator and a pwm voltage regulator. The voltage detector detects a ...
Precise voltage positioning using dc-dc converter
Analog Devices, Inc.
May 03, 2018 - N°20180120877

Techniques to control the start point of an output voltage of a power supply for a short period after receive a “stop switching” signal, which will switch a dc-dc switching regulator from a pulse width modulation (pwm) mode to a linear mode to precisely position the output voltage at a certain level. In this way, the ...
Adjusting print medium retrieval
Hewlett-packard Development Company, L.p.
May 03, 2018 - N°20180118491

Example implementations relate to adjusting print medium retrieval. For example, a system may include a printing device that may have a pick roller attached to a pick arm and a servomotor to apply torque to the pick roller. The system may further include a controller associated with the servomotor to determine a measured position of the servomotor relative to an ...
Electronic driver with zeta scan component
Luxor Scientific Inc.
April 26, 2018 - N°20180116034

An electronic lighting system with a driver for providing light from visible light bulbs and non-visible light bulbs, including from infrared, ultraviolet, led and fluorescent lamps of multiple sizes and wattages, having power factor correction, surge protection, current sensing, current adjustment feedback, and dimming system. There are transformers dedicated to particular lamp receptacles that include interloper diodes and resistor sets ...
Voice coil motor pulse width modulation-to-linear smooth transition control
Texas Instruments Incorporated
April 26, 2018 - N°20180115268

Methods and apparatus providing a smooth transition from a pulse width modulation mode to a linear mode to drive a voice coil motor are disclosed. An example apparatus includes an h-bridge; a pulse generator to generate a pulse when the voice coil motor driver transitions from pulse width modulation mode to linear mode; a first boost circuit to, when the ...
Drive apparatus and automobile
Toyota Jidosha Kabushiki Kaisha
April 19, 2018 - N°20180105163

As a control of an inverter, a first pulse width modulation control switches a plurality of switching elements by generating a first pulse width modulation signal of the switching elements, and a second pulse width modulation control switches the switching elements by generating a second pulse width modulation signal of the switching elements based on a voltage modulation rate, a ...
Drive device and vehicle
Toyota Jidosha Kabushiki Kaisha
April 19, 2018 - N°20180105064

A drive device includes a motor, an inverter, an electric power storage device, and an electronic control unit. The electronic control unit is configured to generate a first pulse width modulation (pwm) signal of the switching elements by comparison of a voltage command of each phase according to a torque command of the motor and a carrier wave voltage, as ...
Pulse Width Modulation Patent Pack
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Pulse Width Modulation Patent Applications
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For professional research & prior art discovery
inventor
  • 123+ full patent PDF documents of Pulse Width Modulation-related inventions.
  • Exact USPTO filing data with full-text, images, drawings & claims.
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Power conversion device
Mitsubishi Electric Corporation
April 12, 2018 - N°20180102715

Harmonics are generated when pulse width modulation is carried out with an asymmetrical triangular wave as a carrier signal in a power conversion device. In order to restrict these harmonics, a command value is corrected in advance so as to be distorted, a gate signal of a switching operation is determined lasing a post-correction command value and an asymmetrical carrier ...
Apparatus and method for measuring primary voltage from the secondary side of an isolated power ...
Lifesafety Power, Inc.
April 12, 2018 - N°20180100881

An apparatus includes a zero steady state error regulator with a first input terminal operatively coupled to an isolated power supply primary voltage. A pwm (pulse width modulation) generator is operative to generate two identical pwm signals, each having a duty ratio proportional to the primary voltage. The pwm generator has an input terminal operatively coupled to the zero steady ...
Transient event detector circuit and method
Texas Instruments Deutschland Gmbh
April 05, 2018 - N°20180097443

Disclosed examples include a transient event detector circuit to detect transient events in a switching converter, including a dll circuit to detect changes in a duty cycle of a pulse width modulation signal used to operate a switching converter, and an output circuit to provide a status output signal in a first state when no transient event is detected, and ...
Source device and display apparatus
Samsung Electronics Co., Ltd.
March 29, 2018 - N°20180091830

A source device includes a communication interface that communicates with a display apparatus, a memory, a first processor that processes an image, stores the processed first image in the memory, and transmits a pulse width modulation (pwm) signal to the display apparatus through the communication interface, and a second processor that transmits a second image stored in the memory to ...
Transmission device with pulse width modulation and transmission system
Fujitsu Limited
March 29, 2018 - N°20180091334

A transmission device outputs a modulated signal based on amplitude information and phase information respectively indicating an amplitude and a phase of a transmission symbol. The transmission device includes: an oscillation signal generation circuit configured to generate an oscillation signal based on the phase information; a laser light source configured to be driven by the oscillation signal; a bias controller ...
Current sampling and processing device and method for an inverter
Nio Nextev Limited
March 29, 2018 - N°20180091063

The present invention provides current sampling and processing device and method for an inverter, wherein said method comprises: setting initialization parameters during initial start-up of the current sampling and processing process and subsequently enabling a pulse width modulation counter; triggering and implementing a current sampling operation when the value of the pulse width modulation counter equals to the value of ...
Ultrasonic atomization control system and electronic cigarette
Shenzhen First Union Technology Co., Ltd.
March 29, 2018 - N°20180090923

Disclosed are an ultrasonic atomization control system and an electronic cigarette. The system includes: a current feedback circuit and/or a voltage feedback circuit, a microcontroller unit, a push-pull circuit, and an oscillator driving circuit; wherein the push-pull circuit is coupled between the microcontroller unit and the oscillator driving circuit, the current feedback circuit and/or the voltage feedback circuit ...
Method and ultrasound system for forming contrast pulse sequence ultrasound image
Siemens Medical Solutions Usa, Inc.
March 29, 2018 - N°20180085092

A method for forming a contrast pulse sequence ultrasound image using a pulse width modulation scheme and an ultrasound system using the same are disclosed. The ultrasound system generates at least three kinds of mutually different pulses having a same amplitude, and sequentially transmits at least three kinds of transmission signals corresponding to the at least three kinds of mutually ...
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