Patents by Inventor Emmanuel Marchais
Emmanuel Marchais has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11933822Abstract: A method for estimating actuator parameters for an actuator, in-situ and in real-time, may include driving the actuator with a test signal imperceptible to a user of a device comprising the actuator during real-time operation of the device, measuring a voltage and a current associated with the actuator and caused by the test signal, determining one or more parameters of the actuator based on the voltage and the current, determining an actuator type of the actuator based on the one or more parameters, and controlling a playback signal to the actuator based on the actuator type.Type: GrantFiled: January 12, 2022Date of Patent: March 19, 2024Assignee: Cirrus Logic Inc.Inventors: Jorge L. Reynaga, Marco A. Janko, Emmanuel A. Marchais, John L. Melanson
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Patent number: 11908310Abstract: A method may include receiving, by a transducer driving system, a first signal for driving an amplifier that drives an electromagnetic load and receiving, by the transducer driving system, a second signal driven by the amplifier in order to control a feedback loop of the transducer driving system. The method may also include detecting unexpected spectral content in the second signal, declaring an indicator event based on the detected unexpected spectral content, determining whether the indicator event occurs in an undesired pattern, and in response to the indicator event occurring in the undesired pattern, modifying a behavior of the transducer driving system.Type: GrantFiled: December 13, 2021Date of Patent: February 20, 2024Assignee: Cirrus Logic Inc.Inventors: Dana J. Taipale, Jon D. Hendrix, Emmanuel A. Marchais
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Publication number: 20230336013Abstract: A method of adapting a battery charging profile of a battery may include monitoring one or more parameters associated with the battery during normal operation of a device powered from the battery and while the battery is simultaneously charged by a charger and is discharged by a dynamic system load of the device, determining an impedance of the battery based on the one or more parameters, determining a condition of the battery based on the impedance and the one or more parameters, and adapting the battery charging profile based on the condition.Type: ApplicationFiled: April 4, 2023Publication date: October 19, 2023Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Emmanuel A. MARCHAIS, Eric J. KING, John L. MELANSON
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Patent number: 11779956Abstract: Driver circuitry for driving an electromechanical load with a drive output signal, the driver circuitry comprising: a first control loop operable to control the drive output signal based on a drive input signal; and a second control loop operable to control the drive output signal based on a current flowing through and/or a voltage induced across the electromechanical load, wherein the second control loop is configured to have a lower latency than the first control loop, and to control the drive output signal to compensate for an impedance of the electromechanical load.Type: GrantFiled: October 19, 2021Date of Patent: October 10, 2023Assignee: Cirrus Logic Inc.Inventors: Carl Lennart Ståhl, Emmanuel Marchais, Anthony Stephen Doy, John L. Melanson
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Patent number: 11765499Abstract: In accordance with embodiments of the present disclosure, a method of driving a playback waveform to an electromagnetic actuator by a transducer driving system may include operating the transducer driving system in a first mode wherein the electromagnetic actuator is driven with the playback waveform in a closed loop to form a closed-loop voltage drive system that includes a negative impedance, operating the transducer driving system in a second mode wherein the electromechanical actuator is driven with the playback waveform in an open loop, and operating a mode switch for transitioning the transducer driving system to operate between the first mode and the second mode.Type: GrantFiled: January 11, 2022Date of Patent: September 19, 2023Assignee: Cirrus Logic Inc.Inventors: Jon D. Hendrix, Emmanuel A. Marchais, Nicholas Joseph, Bryant Tran, Marco A. Janko, Noel Preecs
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Patent number: 11736093Abstract: 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.Type: GrantFiled: October 6, 2022Date of Patent: August 22, 2023Assignee: Cirrus Logic Inc.Inventors: Emmanuel Marchais, Pablo Peso Parada, Eric Lindemann
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Publication number: 20230237886Abstract: A method for determining and mitigating over-excursion of an internal mass of an electromechanical transducer may include measuring a sensed signal associated with the electromechanical transducer in response to a driving signal driven to the electromechanical transducer, determining a non-linearity value based on the sensed signal, mapping the non-linearity value to a probability of over-excursion of the internal mass, and applying a gain to a signal path configured to generate the driving signal based on the probability.Type: ApplicationFiled: December 14, 2022Publication date: July 27, 2023Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Marco A. JANKO, Filippo ROSSI, Hamid SEPEHR, Kyle WILKINSON, Emmanuel A. MARCHAIS, Vadim KONRADI, Anil LAL, Aleksey S. KHENKIN, Chin Huang YONG
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Patent number: 11644370Abstract: A system for performing force sensing with an electromagnetic load may include a signal generator configured to generate a signal for driving an electromagnetic load and a processing subsystem configured to monitor at least one operating parameter of the electromagnetic load and determine a force applied to the electromagnetic load based on a variation of the at least one operating parameter.Type: GrantFiled: September 12, 2019Date of Patent: May 9, 2023Assignee: Cirrus Logic, Inc.Inventors: Emmanuel Marchais, Kathryn Rose Holland, Carl Lennart Ståhl, Eric Lindemann
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Publication number: 20230030780Abstract: 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.Type: ApplicationFiled: October 6, 2022Publication date: February 2, 2023Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Emmanuel MARCHAIS, Pablo PESO PARADA, Eric LINDEMANN
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Publication number: 20220408181Abstract: In accordance with embodiments of the present disclosure, a method of driving a playback waveform to an electromagnetic actuator by a transducer driving system may include operating the transducer driving system in a first mode wherein the electromagnetic actuator is driven with the playback waveform in a closed loop to form a closed-loop voltage drive system that includes a negative impedance, operating the transducer driving system in a second mode wherein the electromechanical actuator is driven with the playback waveform in an open loop, and operating a mode switch for transitioning the transducer driving system to operate between the first mode and the second mode.Type: ApplicationFiled: January 11, 2022Publication date: December 22, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Jon D. HENDRIX, Emmanuel A. MARCHAIS, Nicholas JOSEPH, Bryant TRAN, Marco A. JANKO, Noel PREECS
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Publication number: 20220404398Abstract: A method for estimating actuator parameters for an actuator, in-situ and in real-time, may include driving the actuator with a test signal imperceptible to a user of a device comprising the actuator during real-time operation of the device, measuring a voltage and a current associated with the actuator and caused by the test signal, determining one or more parameters of the actuator based on the voltage and the current, determining an actuator type of the actuator based on the one or more parameters, and controlling a playback signal to the actuator based on the actuator type.Type: ApplicationFiled: January 12, 2022Publication date: December 22, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Jorge L. REYNAGA, Marco A. JANKO, Emmanuel A. MARCHAIS, John L. MELANSON
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Publication number: 20220406152Abstract: A method may include receiving, by a transducer driving system, a first signal for driving an amplifier that drives an electromagnetic load and receiving, by the transducer driving system, a second signal driven by the amplifier in order to control a feedback loop of the transducer driving system. The method may also include detecting unexpected spectral content in the second signal, declaring an indicator event based on the detected unexpected spectral content, determining whether the indicator event occurs in an undesired pattern, and in response to the indicator event occurring in the undesired pattern, modifying a behavior of the transducer driving system.Type: ApplicationFiled: December 13, 2021Publication date: December 22, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Dana J. TAIPALE, Jon D. HENDRIX, Emmanuel A. MARCHAIS
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Patent number: 11509292Abstract: 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.Type: GrantFiled: September 3, 2019Date of Patent: November 22, 2022Assignee: Cirrus Logic, Inc.Inventors: Emmanuel Marchais, Pablo Peso Parada, Eric Lindemann
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Publication number: 20220359113Abstract: A system may include an electromagnetic actuator, a first coil configured to drive mechanical displacement of the electromagnetic actuator, a second coil configured to drive mechanical displacement of the electromagnetic actuator, and an inductance sensing subsystem having an inductance sensing path coupled to the first coil and the second coil.Type: ApplicationFiled: January 4, 2022Publication date: November 10, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Emmanuel A. MARCHAIS, Tejasvi DAS, Siddharth MARU
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Publication number: 20220344958Abstract: A battery management system, may include an input configured to couple to a power supply, an output configured to couple to a battery, and battery management circuitry coupled between the power supply and the battery and configured to deliver electrical energy to the output at a significantly higher peak-to-average power ratio than receipt of electrical energy to the input.Type: ApplicationFiled: August 6, 2021Publication date: October 27, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: John L. MELANSON, Eric J. KING, Emmanuel MARCHAIS
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Publication number: 20220320999Abstract: A power delivery system may include an inductive power converter comprising a shared connection to a shared voltage from a battery, multiple inductive phases, each of the multiple inductive phases configured to generate a respective voltage from the shared voltage, multiple regulated voltage connections, and one or more switches configured and arranged to selectively assign at least one of the multiple inductive phases to a regulated voltage connection selected from the multiple regulated voltage connections.Type: ApplicationFiled: April 1, 2021Publication date: October 6, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Emmanuel MARCHAIS, Ross C. MORGAN, Ivan PERRY, Eric J. KING
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Patent number: 11396031Abstract: Driver circuitry for driving an electromechanical load with a drive output signal based on a digital reference signal at a first sample rate, the drive output signal inducing a first electrical quantity at the electromechanical load, the driver circuitry comprising: a function block configured, based on said first electrical quantity, to digitally determine at a second sample rate higher than the first sample rate an adjustment signal indicative of a second electrical quantity which would be induced at a target output impedance of the driver circuitry due to said first electrical quantity; and a driver configured to generate the drive output signal based on the reference signal and the adjustment signal to cause the drive output signal to behave as if an output impedance of the driver circuitry has been adjusted to comprise the target output impedance, wherein the first electrical quantity is a current and the second electrical quantity is a voltage, or vice versa.Type: GrantFiled: July 14, 2020Date of Patent: July 26, 2022Assignee: Cirrus Logic, Inc.Inventors: Carl Lennart Ståhl, Emmanuel Marchais, Anthony Stephen Doy, John L. Melanson
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Publication number: 20220224127Abstract: A two-cell battery management system may include a switching network comprising a plurality of switches configured to electrically couple two battery cells to one another and a first load configured to receive electrical energy from the two battery cells and control circuitry configured to dynamically control the switching network among a plurality of switching configurations comprising a first switching configuration in which the first load is in parallel with both of the two battery cells, a second switching configuration in which the first load is in parallel with a first battery cell of the two battery cells and is electrically isolated from a second battery cell of the two battery cells, and a third switching configuration in which the first load is in parallel with the second battery cell and is electrically isolated from the first battery cell.Type: ApplicationFiled: September 3, 2021Publication date: July 14, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Emmanuel A. MARCHAIS, James M. NOHRDEN, John L. MELANSON
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Patent number: 11333622Abstract: 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.Type: GrantFiled: April 7, 2020Date of Patent: May 17, 2022Assignee: Cirrus Logic, Inc.Inventors: Emmanuel Marchais, Carl Lennart Ståhl, Eric Lindemann, Jason W. Lawrence, Dayong Zhou
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Publication number: 20220137143Abstract: A method of management of a battery that powers a component of a device may include monitoring a terminal voltage and a terminal current of the battery under a load that is drawing a current on the battery to provide power to a component of the device and modeling the battery as a battery model that approximates a relationship between the monitored terminal voltage and terminal current over at least one of: a certain frequency range; a certain duration, a certain amplitude range, an applied load, a set of conditions of the battery, and a set of conditions of the load. The relationship between the terminal voltage and the terminal current may have a frequency-dependent characteristic including at least two time constants. The two time constants may represent a time-varying relationship between an input and output of the battery model.Type: ApplicationFiled: September 1, 2021Publication date: May 5, 2022Inventors: John L. MELANSON, Emmanuel MARCHAIS, Eric J. KING, James T. NOHRDEN