-
公开(公告)号：US20230171540A1
公开(公告)日：2023-06-01
申请号：US18101816
申请日：2023-01-26
Inventor： Anthony S. DOY , Eric J. KING
IPC: H04R3/00 , H03K17/687
CPC classification number: H04R3/00 , H03K17/687 , H03F3/217
Abstract: The application describes a switched driver (401) for outputting a drive signal at an output node (402) to drive a load such as a transducer. The driver receives respective high-side and low-side voltages (VinH, VinL) defining an input voltage at first and second input nodes and has connections for first and second capacitors (403H, 403L). A network of switching paths is configured such that each of the first and second capacitors can be selectively charged to the input voltage, the first input node can be selectively coupled to a first node (N1) by a path that include or bypass the first capacitor, and the second input node can be selectively coupled to a second node (N2) by a path that includes or bypasses the second capacitor. The output node (402) can be switched between two switching voltages at the first or second nodes. The driver is selectively operable in different operating modes, where the switching voltages are different in each of said modes.
-
公开(公告)号：US20220255515A1
公开(公告)日：2022-08-11
申请号：US17173813
申请日：2021-02-11
Inventor： Ravi K. KUMMARAGUNTLA , Christophe J. AMADI , John L. MELANSON , Axel THOMSEN , John C. TUCKER , Eric J. KING
IPC: H03F3/387 , G01R31/40 , G01R31/3842
Abstract: A signal processing system may include a signal path and a chop management circuit. The signal path may comprise a chopper configured to chop a differential input signal to the signal path at a chopping frequency and a low-pass filter downstream of the chopper and configured to filter out intermodulation products of a direct current offset of the signal path and intermodulation products of an aggressor on the differential input signal in order to generate an output signal. The chop management circuit may be communicatively coupled to the chopper and configured to, based on operational parameters associated with the signal path, dynamically manage energy of one or more clock signals used to define the chopping frequency.
-
公开(公告)号：US20220158635A1
公开(公告)日：2022-05-19
申请号：US17590943
申请日：2022-02-02
Inventor： Axel THOMSEN , Eric J. KING , Anthony S. DOY , Thomas H. HOFF , John L. MELANSON
IPC: H03K17/687 , H02N2/00 , H02M3/158
Abstract: This application relates to methods and apparatus for driving a transducer with switching drivers. A switching driver has first and second supply node for receiving supply voltages and includes an output bridge stage, a capacitor and a network of switches. The network of switches is operable in different switch states to provide different switching voltages to the output bridge stage. A controller is configured to control the switch state of the network of switches and a duty cycle of output switches of the output bridge stage based on an input signal to generate an output signal for driving the transducer.
-
公开(公告)号：US20210050832A1
公开(公告)日：2021-02-18
申请号：US16986623
申请日：2020-08-06
Inventor： Jason W. LAWRENCE , Eric J. KING , Christian LARSEN , Hasnain AKRAM , Eric KIMBALL
Abstract: A method for operating a charge pump having a variable switching frequency may include comparing a target minimum output voltage with an output voltage generated at an output of the charge pump and controlling switching of switches of the charge pump based on the comparison such that the variable switching frequency varies as an output current driven by the charge pump varies.
-
公开(公告)号：US20200225786A1
公开(公告)日：2020-07-16
申请号：US16831323
申请日：2020-03-26
Inventor： Siddharth MARU , Tejasvi DAS , Luke LAPOINTE , Srdjan MARIJANOVIC , Zhong YOU , Drew KINNEY , Anthony S. DOY , Eric J. KING
Abstract: A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to at a plurality of periodic intervals, measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor. The system may also include a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency and a driving amplitude, wherein at least one of the driving frequency and the driving amplitude varies among the plurality of periodic intervals.
-
Patent Agency Ranking
16.发明申请公开(公告)号：US20200044616A1
公开(公告)日：2020-02-06
申请号：US16190427
申请日：2018-11-14
Inventor： Tejasvi DAS , Eric J. KING , Xin ZHAO , Xiaofan FEI , Johann G. GABORIAU , Lei ZHU , John L. MELANSON , Thomas HOFF
Abstract: A system may include a digital modulator configured to modulate an input signal received at an input of the digital modulator to generate a modulated input signal at an output of the digital modulator, a digital gain element having a digital gain and coupled to the digital modulator, an open-loop Class-D amplifier coupled to an output of the digital modulator and configured to amplify the modulated input signal, wherein the open-loop Class-D amplifier is powered from a variable power supply having a variable supply voltage which is variable in response to one or more characteristics of the input signal, and a control circuit configured to control the digital gain to approximately cancel changes in an analog gain of the open-loop Class-D amplifier due to variation in the variable supply voltage in response to the one or more characteristics of the input signal.
-
17.发明申请公开(公告)号：US20190386561A1
公开(公告)日：2019-12-19
申请号：US16441449
申请日：2019-06-14
Inventor： Eric J. KING , Siddharth MARU , Thomas HOFF , Graeme G. MACKAY
Abstract: A method may include controlling switching behavior of switches of a switch-mode power supply based on a desired physical quantity associated with the switch-mode power supply, wherein the desired physical quantity is based at least in part on a slope compensation signal, generating the slope compensation signal to have a compensation value of approximately zero as seen by a compensation control loop of the switch-mode power supply, and modifying the slope compensation signal on successive switching cycles of the switch-mode power supply to account for differences in an output of the compensation control loop and an average current of an inductor of the switch-mode power supply in at least one phase of a switching period of a switching cycle of the switch-mode power supply.
-
公开(公告)号：US20180234014A1
公开(公告)日：2018-08-16
申请号：US15432150
申请日：2017-02-14
Inventor： Sarang VADNERKAR , Ullas PAZHAYAVEETIL , Eric J. KING
CPC classification number: H02M3/157 , H02M1/08 , H02M3/1588 , H02M2001/0009 , H02M2001/0058 , Y02B70/1466
Abstract: A method may include operating a DC-DC switch converter in a forced continuous conduction mode in which for each switching cycle of the switch converter during the forced continuous conduction mode, the switch converter operates in a series of phases including: a first phase in which an inductor current flowing in an inductor of the switch converter increases from zero to a controlled positive current magnitude with respect to a first terminal and a second terminal of the inductor; a second phase in which the inductor current decreases from the controlled positive current magnitude to approximately zero; a third phase in which the inductor current decreases from approximately zero to a controlled negative current magnitude with respect to a first terminal and a second terminal of the inductor; and a fourth phase in which the inductor current increases from the controlled negative current magnitude to approximately zero.
-
公开(公告)号：US20180109181A1
公开(公告)日：2018-04-19
申请号：US15783506
申请日：2017-10-13
Inventor： Eric J. KING , Aaron J. BRENNAN , Christian LARSEN , John L. MELANSON , Yongjie CHENG , Adrian COLLI-MENCHI
IPC: H02M3/07
CPC classification number: H02M3/07 , H02M1/32 , H02M2001/0045 , H03F1/0211 , H03F3/187 , H03F3/21 , H03F3/213 , H03F2200/03 , H03M1/66
Abstract: A system may include a charge pump configured to operate in a plurality of modes including a first mode in which the ratio of an output voltage to an input voltage of the charge pump is a first ratio and a second mode in which the ratio is a second ratio and a controller configured to limit current flowing between a power source of the charge pump to the charge pump, wherein the power source provides the input voltage, by limiting a transfer of charge between the power source and the charge pump during a switching cycle of the charge pump responsive to a change in operation between modes of the plurality of modes.
-
公开(公告)号：US20180041173A1
公开(公告)日：2018-02-08
申请号：US15661446
申请日：2017-07-27
Inventor： Emmanuel MARCHAIS , Lingli ZHANG , Eric J. KING , Christian LARSEN
CPC classification number: H03F1/32 , H03F3/187 , H03F3/2175 , H03F2200/165 , H03F2200/351
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.
-
-
-
-
-
-
-
-
-
Search Results
78
records
(took 0.023 seconds)
