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Voltage Comparator

Voltage Comparator-related patent applications - as published by the U.S. Patent and Trademark Office (USPTO).


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Voltage compensation circuits and voltage compensation methods thereof
Shenzhen China Star Optoelectronics Technology Co., Ltd.
May 03, 2018 - N°20180122325

A voltage compensation circuit and a method thereof are provided. The voltage compensation circuit includes a power management chip, a feedback circuit, and a control circuit. A gate driving voltage (vgh) connects an input end of the control circuit, the input end of the control circuit connects to a first end of the fifth resistor (r5), and a second end ...
Dynamic current sink for stabilizing low dropout linear regulator
Mediatek Inc.
May 03, 2018 - N°20180120874

A dynamic current sink includes the following elements. A voltage comparator compares a reference voltage with a second control signal from an ldo (low dropout linear regulator) to generate a first control signal. A first transistor selectively pulls down a voltage at a first node according to the first control signal. The inverter is coupled between the first node and ...
High voltage comparator with low-sensitivity to variations of process/temperature and supply
Stmicroelectronics S.r.l.
March 29, 2018 - N°20180091052

A voltage comparator for detecting a voltage difference in a high-voltage domain, wherein said comparator receives an input voltage and compares it with a reference voltage also received in input, in which the output voltage from the comparator assumes the logic value 1 if the input voltage is greater than the reference voltage and assumes the logic value 0 if the input ...
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Active tamper detection circuit with bypass detection and method therefor
Freescale Semiconductor, Inc.
March 01, 2018 - N°20180061780

An active tamper detection circuit with bypass detection is provided. A bypass detection circuit is coupled to an active mesh loop. The bypass detector includes a voltage comparator with a variable hysteresis control circuit and a calibration engine. The bypass detector detects a change in impedance in the mesh when an attacker attempts to bypass the active loop using a ...
Display device and drive method therefor
Sharp Kabushiki Kaisha
March 01, 2018 - N°20180061328

In a current measurement period of a pixel circuit (20), a measurement voltage is applied to a non-inverting input terminal of an operational amplifier (31), switches (35, 36) turn on, and a switch (37) turns off. Next, the switch (36) turns off, and a capacitor (32) is charged with charge of a current flowing through the pixel circuit (20). Next, the switch (35) turns off, the switch (37) turns on, ...
Current resonant power supply device
Sanken Electric Co., Ltd.
February 08, 2018 - N°20180041129

A burst oscillation circuit operates switches in a burst oscillation mode based on a feedback signal. A first burst operation cancellation threshold voltage comparator compares a first burst operation cancellation threshold voltage set higher than a voltage of the feedback signal that a load current reaches the standby threshold and a voltage of the feedback signal, and outputs a first ...
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Time-based delay line analog comparator
Microchip Technology Incorporated
January 25, 2018 - N°20180026648

Embodiments of the present disclosure include voltage comparators. The voltage comparators may include a first input configured to receive a first analog voltage, a second input configured to receive a second analog voltage, a first digital delay line configured to propagate the first analog voltage through a first delay circuit and the second analog voltage through a second circuit, and ...
Measuring output current in a buck smps
Microchip Technology Incorporated
January 25, 2018 - N°20180024171

A sample and hold circuit takes a sample of the current flowing through an inductor of a buck switched-mode power supply (smps) at substantially the middle of the low side portion (50 percent point during low side switch on) of the pulse width modulation (pwm) period. This sample of the current through the smps inductor during the low side on 50% point ...
Welding power supplies having adjustable current ramping rates
Illinois Tool Works Inc.
January 25, 2018 - N°20180021872

Welding power supplies having adjustable current ramping rates are disclosed. An example welding power supply, comprising: a switched mode power supply to convert primary power to welding-type power having an output current based on a current control loop; a voltage sensing circuit to measure a weld voltage; a voltage comparator to determine whether the weld voltage corresponds to a welding ...
Semiconductor x-ray detector
Shenzhen Xpectvision Technology Co., Ltd.
January 18, 2018 - N°20180017685

An apparatus for detecting x-ray, comprising: an x-ray absorption layer comprising an electrode; a first voltage comparator configured to compare a voltage of an electrode to a first threshold; a second voltage comparator configured to compare the voltage to a second threshold; a counter configured to register a number of x-ray photons absorbed by the x-ray absorption layer; a controller; ...
Electrical system comprising a stack of electrochemical cells and method for controlling said system
Areva Stockage D'energie
December 07, 2017 - N°20170352898

An electrical system includes a stack (3) of electrochemical cells (5), a power converter (9) electrically connected to the stack (3), a voltage comparator (7) for comparing the voltage at the terminals of at least one group of at least one electrochemical cell (5) of the stack (3) to a threshold voltage, and a control module (11) for controlling the converter (9). The control module (11) includes a generator (74) for ...
Igniter
October 19, 2017 - N°20170302060

An igniter includes a switch element and a switch control apparatus. An ignition signal igt is input to an input line of the switch control apparatus. A high-frequency filter removes high-frequency noise from the input line. A voltage comparator compares an output voltage vfil of the high-frequency filter with a reference voltage vref, so as to generate a judgment signal ...
Charge pump voltage regulator
Semiconductor Manufacturing International (beijing) Corporation
October 05, 2017 - N°20170288532

A charge pump voltage regulator is provided. The charge pump voltage regulator includes a charge pump circuit, where an output terminal of the charge pump circuit outputs a stable voltage. The charge pump voltage regulator also includes a voltage divider circuit suitable to divide the stable voltage to output a divided voltage and a clock oscillator providing a drive clock ...
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Memory controllers
Hewlett Packard Enterprise Development Lp
August 31, 2017 - N°20170249987

A memory controller includes a voltage driver and a voltage comparator. The voltage driver applies a variable voltage to a selected line of a crossbar array to determine a first measured voltage that drives a first read current through a selected memory cell of the crossbar array. The voltage driver applies the variable voltage to the selected line to determine ...
Short detection circuit and display device including the same
Samsung Display Co., Ltd.
August 24, 2017 - N°20170245379

A short detection circuit includes a reference voltage generator that generates a reference voltage based on a power voltage, a comparison voltage generator that generates a comparison voltage that is higher or lower than a normal state voltage of a short detection target voltage by a predetermined adjustment voltage based on the reference voltage, a voltage comparator that generates a ...
Feedback control circuit and method thereof
Realtek Semiconductor Corp.
July 20, 2017 - N°20170207702

Disclosed are a feedback control circuit and a method thereof. The feedback control circuit includes a voltage comparator, a calibration voltage generator and processor. The voltage comparator receives a middle-point voltage and a calibration voltage, compares the middle-point voltage and calibration voltage, and outputs a reference voltage pulse signal. The calibration voltage generator generates the calibration voltage and outputs it ...
Two-terminal store-and-control circuit
X-celeprint Limited
June 29, 2017 - N°20170188427

A two-terminal store-and-control circuit includes a power circuit for receiving a modulated first signal, for receiving a second signal, for providing a power signal, and for providing a v− signal. A voltage comparator receives the modulated first signal and the v+ signal and provides a data signal that is extracted from the modulated first signal and the power signal. ...
Voltage compensation circuits and voltage compensation methods thereof
Shenzhen China Star Optoelectronics Technology Co., Ltd.
June 29, 2017 - N°20170186354

The present disclosure discloses a voltage compensation circuit and the method thereof. The voltage compensation circuit includes a power management chip, a feedback circuit, and a control circuit. A gate driving voltage (vgh) connects an input end of the control circuit, the input end of the control circuit connects to a first end of the fifth resistor (r5), and a ...
Voltage detection circuit
Freebird Semiconductor Corporation
June 15, 2017 - N°20170170821

A detection circuit includes an under-voltage circuit. The under-voltage circuit includes a first gan high electron mobility transistor (hemt) configured to operate as both a voltage comparator and a voltage reference. The detection circuit can also include an over-voltage detection circuit. The over-voltage detection circuit includes a second gan hemt that is also configured to operate as both a voltage ...
Method and system to prevent voltage sagging in a redundant power supply configuration
Cisco Technology, Inc.
June 08, 2017 - N°20170163027

Aspects of the subject technology relate to a system and method for preventing voltage sagging using an oring-fet in a redundant power supply configuration. Each redundant power supply includes an oring-fet and a voltage comparator. The voltage comparator receives and compares an input voltage and an output voltage of the oring-fet during power up. In the event input voltage is ...
Digitally calibrated successive approximation register analog-to-digital converter
Avnera Corporation
May 04, 2017 - N°20170126240

A circuit can include a voltage comparator vd having a first input, a second input, and an output; a first plurality of capacitors cp[0:n] that each have a top plate and a bottom plate, wherein each top plate is electrically coupled with the first input of the voltage comparator vd, wherein each top plate is also switchably electrically coupled ...
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