Patents by Inventor Christophe J. Amadi
Christophe J. Amadi 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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Publication number: 20240106448Abstract: A system may include a sampling capacitor and a switch network. The switch network may include one or more first sampling switches electrically coupled to the sampling capacitor and configured to be activated during a first phase of a sampling cycle of the system and one or more second sampling switches electrically coupled to the sampling capacitor and configured to be activated during a second phase of the sampling cycle, wherein the switch network is configured to reset the sampling capacitor to a data-independent and/or signal-independent charge during a reset phase of the sampling cycle.Type: ApplicationFiled: September 26, 2022Publication date: March 28, 2024Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Arashk NOROUZPOURSHIRAZI, Ramin ZANBAGHI, Stephen T. HODAPP, Christophe J. AMADI, Ravi K. KUMMARAGUNTLA, Dhrubajyoti DUTTA
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Patent number: 11652455Abstract: 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.Type: GrantFiled: February 11, 2021Date of Patent: May 16, 2023Assignee: Cirrus Logic, Inc.Inventors: Ravi K. Kummaraguntla, Christophe J. Amadi, John L. Melanson, Axel Thomsen, John C. Tucker, Eric J. King
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Publication number: 20220255515Abstract: 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.Type: ApplicationFiled: February 11, 2021Publication date: August 11, 2022Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Ravi K. KUMMARAGUNTLA, Christophe J. AMADI, John L. MELANSON, Axel THOMSEN, John C. TUCKER, Eric J. KING
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Patent number: 10284217Abstract: In accordance with embodiments of the present disclosure, a processing system may include multiple selectable processing paths for processing an analog signal in order to reduce noise and increase dynamic range. Techniques are employed to transition between processing paths and calibrate operational parameters of the two paths in order to reduce or eliminate artifacts caused by switching between processing paths.Type: GrantFiled: January 29, 2018Date of Patent: May 7, 2019Assignee: Cirrus Logic, Inc.Inventors: Edmund Mark Schneider, Daniel J. Allen, Aniruddha Satoskar, Seyedeh Maryam Mortazavi Zanjani, Brian P. Chesney, John C. Tucker, Christophe J. Amadi
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Patent number: 9831839Abstract: A method for producing an output voltage to a load may include, in a power stage comprising power converter having a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, and an output for producing the output voltage comprising a first output terminal and a second output terminal, controlling the linear amplifier to transfer electrical energy from the input source of the power stage to the load in accordance with one or more least significant bits of a digital input signal, and controlling the power converter in accordance with bits of the digital input signal other than the one or more least significant bits to sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load.Type: GrantFiled: March 7, 2017Date of Patent: November 28, 2017Assignee: Cirrus Logic, Inc.Inventors: Eric J. King, Christophe J. Amadi, John L. Melanson
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Publication number: 20170179895Abstract: A method for producing an output voltage to a load may include, in a power stage comprising power converter having a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, and an output for producing the output voltage comprising a first output terminal and a second output terminal, controlling the linear amplifier to transfer electrical energy from the input source of the power stage to the load in accordance with one or more least significant bits of a digital input signal, and controlling the power converter in accordance with bits of the digital input signal other than the one or more least significant bits to sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load.Type: ApplicationFiled: March 7, 2017Publication date: June 22, 2017Applicant: Cirrus Logic, Inc.Inventors: Eric J. King, Christophe J. Amadi, John L. Melanson
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Patent number: 9654056Abstract: A power converter may include a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, an output for producing the output voltage, wherein a first switch is coupled to a first output terminal of the output and a second switch is coupled to a second output terminal of the output, and a linear amplifier coupled to the output. The controller may be configured to, in a linear amplifier mode of the power stage, enable the linear amplifier to transfer electrical energy from an input source of the power stage to the load, and in at least one mode of the power stage other than the linear amplifier mode, sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer the electrical energy from the input source to the load.Type: GrantFiled: May 7, 2015Date of Patent: May 16, 2017Assignee: Cirrus Logic, Inc.Inventors: Christophe J. Amadi, Siddharth Maru, Eric J. King
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Patent number: 9628033Abstract: A method for producing an output voltage to a load may include, in a power stage comprising power converter having a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, and an output for producing the output voltage comprising a first output terminal and a second output terminal, controlling the linear amplifier to transfer electrical energy from the input source of the power stage to the load in accordance with one or more least significant bits of a digital input signal, and controlling the power converter in accordance with bits of the digital input signal other than the one or more least significant bits to sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load.Type: GrantFiled: August 31, 2015Date of Patent: April 18, 2017Assignee: Cirrus Logic, Inc.Inventors: Eric J. King, Christophe J. Amadi, John L. Melanson
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Publication number: 20160126908Abstract: A method for producing an output voltage to a load may include, in a power stage comprising power converter having a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, and an output for producing the output voltage comprising a first output terminal and a second output terminal, controlling the linear amplifier to transfer electrical energy from the input source of the power stage to the load in accordance with one or more least significant bits of a digital input signal, and controlling the power converter in accordance with bits of the digital input signal other than the one or more least significant bits to sequentially apply switch configurations from the plurality of switch configurations to selectively activate or deactivate each of the plurality of switches in order to transfer electrical energy from the input source of the power stage to the load.Type: ApplicationFiled: August 31, 2015Publication date: May 5, 2016Inventors: Eric J. King, Christophe J. Amadi, John L. Melanson
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Publication number: 20150323947Abstract: In accordance with embodiments of the present disclosure, a system may include an impedance estimator configured to estimate an impedance of a load and generate a target current based at least on an input voltage and the impedance, a voltage feedback loop responsive to a difference between the input voltage and an output voltage of the load, and a current controller configured to, responsive to the voltage feedback loop, the impedance estimator, and the input voltage, generate an output current to the load.Type: ApplicationFiled: May 7, 2015Publication date: November 12, 2015Inventors: Christophe J. Amadi, Siddharth Maru, Eric J. King