-
公开(公告)号：US11837956B2
公开(公告)日：2023-12-05
申请号：US17478433
申请日：2021-09-17
Inventor： Hasnain Akram , Graeme G. Mackay , Lingli Zhang , Ruoxin Jiang , Sakkarapani Balagopal , Theodore M. Burk
CPC classification number: H02M3/158 , H02M1/0009 , H02M1/32
Abstract: A method for determining if an inductor coupled to a switching network has been electrically shorted may include applying a voltage across the inductor for a predetermined period of time, controlling an impedance in an electrical path of a voltage source generating the voltage and the inductor, sensing an inductor current through the inductor, comparing the inductor current with a predetermined current threshold, and determining whether the inductor has been electrically shorted based on the inductor current, the predetermined current threshold, and the predetermined period of time.
-
公开(公告)号：US11811370B2
公开(公告)日：2023-11-07
申请号：US17502689
申请日：2021-10-15
Inventor： Ramin Zanbaghi , Lingli Zhang , Wei Xu , Justin Richardson , John L. Melanson
CPC classification number: H03F3/217 , G01R19/2506 , H03F2200/375
Abstract: A system for sensing an electrical quantity may include a sensing stage configured to sense the electrical quantity and generate a sense signal indicative of the electrical quantity, wherein the electrical quantity is indicative of an electrical signal generated by a Class-DG amplifier configured to drive a load wherein the Class-DG amplifier has multiple signal-level common modes and a common-mode compensator configured to compensate for changes to a common-mode voltage of a differential supply voltage of the driver occurring when switching between signal-level common modes of the Class-DG amplifier.
-
公开(公告)号：US10193505B2
公开(公告)日：2019-01-29
申请号：US15661446
申请日：2017-07-27
Inventor： Emmanuel Marchais , Lingli Zhang , Eric J. King , Christian Larsen
Abstract: In accordance with embodiments of the present disclosure, a system may have a configurable control loop technology, wherein the system comprises a first mode control loop, a second mode control loop and a reconfigurable pulse width modulator (PWM) configured to generate an output signal from an input signal. The reconfigurable PWM may include a digital PWM and an analog PWM and may be configured such that when the first mode control loop is activated, the reconfigurable PWM utilizes the analog PWM to generate the output signal from the input signal and when the second mode control loop is activated, the reconfigurable PWM utilizes the digital PWM to generate the output signal from the input signal and the digital PWM receives its input from a digital proportional integral derivative controller.
-
公开(公告)号：US12155380B2
公开(公告)日：2024-11-26
申请号：US18188053
申请日：2023-03-22
Inventor： Ross C. Morgan , Yongjie Cheng , Lingli Zhang
IPC: H03K17/687 , H03K17/06
Abstract: This application relates to methods and apparatus for driving a transducer connected between two output nodes in a bridge-tied-load configuration. A driver receives first and second supply voltages and has charge pumps that generate respective first and second boosted voltages. The driver is operable in a first driver mode in which each output node is modulated between the first and second supply voltage; a second driver mode in which one output nodes is modulated between the first and second supply voltages and the other output node is modulated between either the first boosted voltage and the first supply voltage or between the second supply voltage and the second boosted voltage; and a third driver mode in which one of the output nodes is modulated between the first supply voltage and the first boosted voltage and the other output node is modulated between the second supply voltage and the second boosted voltage.
-
公开(公告)号：US12101085B1
公开(公告)日：2024-09-24
申请号：US18188067
申请日：2023-03-22
Inventor： Ross C. Morgan , Joe Walker , Yongjie Cheng , Lingli Zhang
IPC: H03K17/693 , H03K3/017 , H03K17/687
CPC classification number: H03K17/693 , H03K3/017 , H03K17/6871
Abstract: This application relates to methods and apparatus for multichannel drivers for driving transducers in different channels. A multichannel driver has a plurality of output stages configured such that two output nodes can be modulated between selected switching voltages with a controlled duty cycle to generate a differential output signal across a respective transducer, each output stage being operable with different switching voltages in different modes of operation. A first set of two or more of the output stages are arranged to receive a voltage output by a capacitive voltage generator to use as a switching voltage. A controller is configured to control the mode of operation and duty-cycle of each of the output stages based on a respective input signal and also based on operation of the other output stages of the first set.
-
Patent Agency Ranking
公开(公告)号：US11909317B2
公开(公告)日：2024-02-20
申请号：US18174106
申请日：2023-02-24
Inventor： Eric J. King , Ajit Sharma , Lingli Zhang , Christian Larsen , Graeme G. Mackay
Abstract: A system may include a power converter having a maximum allowable input power drawn from a power source, an energy storage element coupled to an output of the power converter at a top plate of the energy storage element, wherein the energy storage element is configured to store excess energy, and control circuitry configured to, when an input power of the power converter exceeds the maximum allowable input power, cause excess energy stored in the energy storage element to be consumed by circuitry coupled to the output of the power converter, and in order to maintain positive voltage headroom for the circuitry coupled to the output of the power converter, selectively couple a bottom plate of the energy storage element to the power source such that excess energy stored by the circuitry coupled to the output of the power converter is consumed from the energy storage device when the input power of the power converter exceeds the maximum allowable input power.
-
公开(公告)号：US11616434B2
公开(公告)日：2023-03-28
申请号：US17892575
申请日：2022-08-22
Inventor： Eric J. King , John L. Melanson , Graeme G. Mackay , Lingli Zhang
Abstract: A battery management system configured to electrically couple to a battery may include a boost converter comprising a plurality of switches arranged to provide a boosted output voltage at an output of the boost converter from a source voltage of the battery and a bypass switch coupled between the battery and the output, wherein the battery management system is operable in a plurality of modes comprising a bypass mode wherein the source voltage is bypassed to the output and when the battery management system is in the bypass mode, at least one switch of the plurality of switches is enabled to increase a conductance between the battery and the output.
-
公开(公告)号：US11469661B2
公开(公告)日：2022-10-11
申请号：US17075139
申请日：2020-10-20
Inventor： Eric J. King , John L. Melanson , Graeme G. MacKay , Lingli Zhang
Abstract: A battery management system configured to electrically couple to a battery may include a boost converter comprising a plurality of switches arranged to provide a boosted output voltage at an output of the boost converter from a source voltage of the battery and a bypass switch coupled between the battery and the output, wherein the battery management system is operable in a plurality of modes comprising a bypass mode wherein the source voltage is bypassed to the output and when the battery management system is in the bypass mode, at least one switch of the plurality of switches is enabled to increase a conductance between the battery and the output.
-
公开(公告)号：US12160166B2
公开(公告)日：2024-12-03
申请号：US17971039
申请日：2022-10-21
Inventor： Lingli Zhang , Yongjie Cheng , John L. Melanson
Abstract: A driver apparatus for driving a load with a differential drive signal is described. For a level of input signal within a first range, a first switching driver modulates the voltage at a first output node with a first modulation index by switchably connecting at least one flying capacitor to the first output node, whilst a second switching driver modulates the voltage at a second output node with a second modulation index by controlling switching between DC voltages that are maintained throughout a switching cycle of the driver apparatus. The first and second switching drivers are controlled so, for at least a first part of the first input range, a change in input signal level results in a change of the first controlled modulation index that has a different magnitude to any change in the second controlled modulation index, a constant modulation frequency of the differential drive signal is maintained.
-
公开(公告)号：US12119834B2
公开(公告)日：2024-10-15
申请号：US17898635
申请日：2022-08-30
Inventor： John L. Melanson , Eric J. King , Thomas H. Hoff , Lingli Zhang
CPC classification number: H03M1/0626 , H03M1/0612 , H03M1/822
Abstract: Pulse width modulation (PWM) driver circuitry comprising: a loop filter configured to receive an analog input signal and to output a digital loop filter output signal based on the analog input signal and an analog feedback signal; and a PWM modulator configured to receive a digital signal based on the digital loop filter output signal and to output a PWM signal, wherein the PWM driver circuitry further comprises a feedback path coupled to an output of the PWM driver circuitry for the analog feedback signal.
-
-
-
-
-
-
-
-
-
Search Results
20
records
(took 0.018 seconds)
