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21.发明授权公开(公告)号：US11736093B2
公开(公告)日：2023-08-22
申请号：US17961011
申请日：2022-10-06
Inventor： Emmanuel Marchais , Pablo Peso Parada , Eric Lindemann
Abstract: A method for identifying a mechanical impedance of an electromagnetic load may include generating a waveform signal for driving an electromagnetic load and, during driving of the electromagnetic load by the waveform signal or a signal derived therefrom, receiving a current signal representative of a current associated with the electromagnetic load and a back electromotive force signal representative of a back electromotive force associated with the electromagnetic load. The method may also include implementing an adaptive filter to identify parameters of the mechanical impedance of the electromagnetic load, wherein an input of a coefficient control for adapting coefficients of the adaptive filter is a first signal derived from the back electromotive force signal and a target of the coefficient control for adapting coefficients of the adaptive filter is a second signal derived from the current signal.
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Patent Agency Ranking
公开(公告)号：US11333622B2
公开(公告)日：2022-05-17
申请号：US16842482
申请日：2020-04-07
Inventor： Emmanuel Marchais , Carl Lennart Ståhl , Eric Lindemann , Jason W. Lawrence , Dayong Zhou
Abstract: A method for determining a direct current impedance of a transducer may include receiving an input signal indicative of an electrical power consumed by the transducer and calculating, by a thermal model of the transducer, the direct current impedance based on the electrical power.
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公开(公告)号：US11283337B2
公开(公告)日：2022-03-22
申请号：US16816790
申请日：2020-03-12
Inventor： Eric Lindemann , Carl Lennart Ståhl , Emmanuel Marchais , John L. Melanson
Abstract: A system may include a signal generator configured to generate a raw waveform signal and a modeling subsystem configured to implement a discrete time model of an electromagnetic load that emulates a virtual electromagnetic load and further configured to modify the raw waveform signal to generate a waveform signal for driving the electromagnetic load by modifying the virtual electromagnetic load to have a desired characteristic, applying the discrete time model to the raw waveform signal to generate the waveform signal for driving the electromagnetic load, and applying the waveform signal to the electromagnetic load.
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公开(公告)号：US11152906B2
公开(公告)日：2021-10-19
申请号：US17012209
申请日：2020-09-04
Inventor： Eric J. King , Emmanuel Marchais
Abstract: A system may include a charge pump configured to boost an input voltage of the charge pump to an output voltage greater than the input voltage, a current mode control loop for current mode control of a power amplifier powered by the output voltage of the charge pump, and a controller configured to, in a current-limiting mode of the controller, control an output power of the charge pump to ensure that an input current of the charge pump is maintained below a current limit, control the power amplifier by placing the power amplifier into a high-impedance mode during the current-limiting mode, and control state variables of a loop filter of the current mode control loop during the current-limiting mode.
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公开(公告)号：US10908200B2
公开(公告)日：2021-02-02
申请号：US16267079
申请日：2019-02-04
Inventor： Zhong You , Siddharth Maru , Tejasvi Das , Luke Lapointe , Eric J. King , Anthony S. Doy , Srdjan Marjianovic , Drew Kinney , Matthew Beardsworth , Emmanuel Marchais
IPC: G01R27/26 , G01R27/02 , G01D5/20 , G01D5/243 , G01R27/28 , G01R31/26 , G01R31/64 , G01R17/16 , G01R21/07
Abstract: A system may include a resistive-inductive-capacitive sensor, a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency, and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to 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, wherein the displacement of the mechanical member causes a change in an impedance of the resistive-inductive-capacitive sensor.
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公开(公告)号：US10726683B1
公开(公告)日：2020-07-28
申请号：US16556897
申请日：2019-08-30
Inventor： Emmanuel Marchais , Eric Lindemann , Carl L. Ståhl
Abstract: A method for identifying a mechanical impedance of an electromagnetic load may include generating a waveform signal for driving an electromagnetic load, the waveform signal comprising a first tone at a first driving frequency and a second tone at a second driving frequency. The method may also include during driving of the electromagnetic load by the waveform signal or a signal derived therefrom, receiving a current signal representative of a current associated with the electromagnetic load and a back electromotive force signal representative of a back electromotive force associated with the electromagnetic load. The method may further include determining amplitude and phase information of the current signal responsive to the first tone and second tone, determining amplitude and phase information of the back electromotive force signal responsive to the first tone and second tone, and identifying parameters of the mechanical impedance of the electromagnetic load based on the amplitude and phase information of the current signal and the amplitude and phase information of the back electromotive force signal.
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