Patents by Inventor Sarang VADNERKAR
Sarang VADNERKAR 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: 11251702Abstract: 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.Type: GrantFiled: February 14, 2017Date of Patent: February 15, 2022Assignee: Cirrus Logic, Inc.Inventors: Sarang Vadnerkar, Ullas Pazhayaveetil, Eric J. King
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Patent number: 11239752Abstract: A method may include monitoring an input power supply, monitoring an inductance of an inductor of a boost converter, monitoring one or more other characteristics of the boost converter, and calculating a target peak inductor current based on the input power supply voltage, the inductance, the one or more other characteristics of the boost converter, and a target average current of the inductor during a switching cycle of the boost converter. A method may include monitoring an input power supply voltage, monitoring an inductance of an inductor of a boost converter, monitoring one or more other characteristics of the boost converter, and calculating an average current of the inductor during a switching cycle of the boost converter based on the input power supply voltage, the inductance, the one or more other characteristics of the boost converter, and a peak inductor current of the inductor.Type: GrantFiled: August 5, 2016Date of Patent: February 1, 2022Assignee: Cirrus Logic, Inc.Inventors: Jeffrey Allen May, Eric J. King, Ku He, Sarang Vadnerkar, Ullas Pazhayaveetil, Theodore M. Burk
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Patent number: 11112481Abstract: An apparatus for calibrating a differential circuit that includes a differential integrator having an input, a gain, and an output connected to a comparator. The differential integrator output is chargeable to a threshold prior to an integration period. The differential integrator integrates the input during the integration period such that the differential integrator output goes toward zero from the threshold. The comparator detects the output of the differential integrator reaching zero. The apparatus includes a closed-loop gain trim circuit to perform a coarse calibration to adjust and set the gain of the differential integrator and a reference generator that generates the threshold to which the differential integrator output is pre-charged. The reference generator is trimmable during a fine calibration to adjust and set the threshold to correct for residual gain error in the differential circuit remaining after the coarse calibration is performed.Type: GrantFiled: May 21, 2019Date of Patent: September 7, 2021Assignee: Cirrus Logic, Inc.Inventors: Sarang Vadnerkar, Vinod Jayakumar
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Patent number: 10958171Abstract: A DC-DC converter and a corresponding method for maintaining an output voltage of the DC-DC converter, wherein the DC-DC converter is configured to operate in a discontinuous conduction mode, within a predetermined voltage range. The method comprises adjusting a duty cycle of the DC-DC converter based on the output voltage to maintain the output voltage within a predetermined voltage range; wherein the duty cycle of the DC-DC converter is adjusted by switching between a first switching frequency to a second switching frequency, and the first switching frequency and the second switching frequency are selected such that the first switching frequency and the second switching frequency fall outside of at least one predefined disallowed frequency band.Type: GrantFiled: May 22, 2018Date of Patent: March 23, 2021Assignee: Cirrus Logic, Inc.Inventors: Sarang Vadnerkar, Ullas Pazhayaveetil, Theodore M. Burk, Jeffrey May
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Patent number: 10749431Abstract: A DC-DC converter and corresponding method for transitioning between a discontinuous conduction mode, DCM, and a continuous conduction mode, CCM, wherein the DC-DC converter is configured to power a signal processing system within an integrated circuit, is provided. The method comprises receiving input data, wherein the input data is for inputting into the signal processing system; determining an amplitude of the input data; and transitioning between DCM and CCM based on the amplitude of the input data. A DC-DC converter and respective method for transitioning from CCM to DCM comprising determining an estimated current representative of an inductor current through an inductor of the DC-DC converter; and transitioning from CCM to DCM based on the estimated current, is provided.Type: GrantFiled: December 20, 2018Date of Patent: August 18, 2020Assignee: Cirrus Logic, Inc.Inventors: Ullas Pazhayaveetil, Sarang Vadnerkar, Theodore M. Burk, Jeffrey May
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Patent number: 10644593Abstract: A DC-DC converter and corresponding method for transitioning between a discontinuous conduction mode, DCM, and a continuous conduction mode, CCM, wherein the DC-DC converter is configured to power a signal processing system within an integrated circuit, is provided. The method comprises receiving input data, wherein the input data is for inputting into the signal processing system; determining an amplitude of the input data; and transitioning between DCM and CCM based on the amplitude of the input data. A DC-DC converter and respective method for transitioning from CCM to DCM comprising determining an estimated current representative of an inductor current through an inductor of the DC-DC converter; and transitioning from CCM to DCM based on the estimated current, is provided.Type: GrantFiled: December 20, 2018Date of Patent: May 5, 2020Assignee: Cirrus Logic, Inc.Inventors: Ullas Pazhayaveetil, Sarang Vadnerkar, Theodore M. Burk, Jeffrey May
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Publication number: 20190361087Abstract: An apparatus for calibrating a differential circuit that includes a differential integrator having an input, a gain, and an output connected to a comparator. The differential integrator output is chargeable to a threshold prior to an integration period. The differential integrator integrates the input during the integration period such that the differential integrator output goes toward zero from the threshold. The comparator detects the output of the differential integrator reaching zero. The apparatus includes a closed-loop gain trim circuit to perform a coarse calibration to adjust and set the gain of the differential integrator and a reference generator that generates the threshold to which the differential integrator output is pre-charged. The reference generator is trimmable during a fine calibration to adjust and set the threshold to correct for residual gain error in the differential circuit remaining after the coarse calibration is performed.Type: ApplicationFiled: May 21, 2019Publication date: November 28, 2019Inventors: Sarang Vadnerkar, Vinod Jayakumar
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Patent number: 10461638Abstract: A DC-DC converter and corresponding method for transitioning between a discontinuous conduction mode, DCM, and a continuous conduction mode, CCM, wherein the DC-DC converter is configured to power a signal processing system within an integrated circuit, is provided. The method comprises receiving input data, wherein the input data is for inputting into the signal processing system; determining an amplitude of the input data; and transitioning between DCM and CCM based on the amplitude of the input data. A DC-DC converter and respective method for transitioning from CCM to DCM comprising determining an estimated current representative of an inductor current through an inductor of the DC-DC converter; and transitioning from CCM to DCM based on the estimated current, is provided.Type: GrantFiled: May 21, 2018Date of Patent: October 29, 2019Assignee: Cirrus Logic, Inc.Inventors: Ullas Pazhayaveetil, Sarang Vadnerkar, Theodore M. Burk, Jeffrey May
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Publication number: 20190123644Abstract: A DC-DC converter and corresponding method for transitioning between a discontinuous conduction mode, DCM, and a continuous conduction mode, CCM, wherein the DC-DC converter is configured to power a signal processing system within an integrated circuit, is provided. The method comprises receiving input data, wherein the input data is for inputting into the signal processing system; determining an amplitude of the input data; and transitioning between DCM and CCM based on the amplitude of the input data. A DC-DC converter and respective method for transitioning from CCM to DCM comprising determining an estimated current representative of an inductor current through an inductor of the DC-DC converter; and transitioning from CCM to DCM based on the estimated current, is provided.Type: ApplicationFiled: December 20, 2018Publication date: April 25, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Ullas PAZHAYAVEETIL, Sarang VADNERKAR, Theodore M. BURK, Jeffrey MAY
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Publication number: 20190123645Abstract: A DC-DC converter and corresponding method for transitioning between a discontinuous conduction mode, DCM, and a continuous conduction mode, CCM, wherein the DC-DC converter is configured to power a signal processing system within an integrated circuit, is provided. The method comprises receiving input data, wherein the input data is for inputting into the signal processing system; determining an amplitude of the input data; and transitioning between DCM and CCM based on the amplitude of the input data. A DC-DC converter and respective method for transitioning from CCM to DCM comprising determining an estimated current representative of an inductor current through an inductor of the DC-DC converter; and transitioning from CCM to DCM based on the estimated current, is provided.Type: ApplicationFiled: December 20, 2018Publication date: April 25, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Ullas PAZHAYAVEETIL, Sarang VADNERKAR, Theodore M. BURK, Jeffrey MAY
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Publication number: 20180337601Abstract: A DC-DC converter and a corresponding method for maintaining an output voltage of the DC-DC converter, wherein the DC-DC converter is configured to operate in a discontinuous conduction mode, within a predetermined voltage range. The method comprises adjusting a duty cycle of the DC-DC converter based on the output voltage to maintain the output voltage within a predetermined voltage range; wherein the duty cycle of the DC-DC converter is adjusted by switching between a first switching frequency to a second switching frequency, and the first switching frequency and the second switching frequency are selected such that the first switching frequency and the second switching frequency fall outside of at least one predefined disallowed frequency band.Type: ApplicationFiled: May 22, 2018Publication date: November 22, 2018Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Sarang VADNERKAR, Ullas PAZHAYAVEETIL, Theodore M. BURK, Jeffrey MAY
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Publication number: 20180337597Abstract: A DC-DC converter and corresponding method for transitioning between a discontinuous conduction mode, DCM, and a continuous conduction mode, CCM, wherein the DC-DC converter is configured to power a signal processing system within an integrated circuit, is provided. The method comprises receiving input data, wherein the input data is for inputting into the signal processing system; determining an amplitude of the input data; and transitioning between DCM and CCM based on the amplitude of the input data. A DC-DC converter and respective method for transitioning from CCM to DCM comprising determining an estimated current representative of an inductor current through an inductor of the DC-DC converter; and transitioning from CCM to DCM based on the estimated current, is provided.Type: ApplicationFiled: May 21, 2018Publication date: November 22, 2018Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Ullas PAZHAYAVEETIL, Sarang VADNERKAR, Theodore M. BURK, Jeffrey MAY
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Publication number: 20180234014Abstract: 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.Type: ApplicationFiled: February 14, 2017Publication date: August 16, 2018Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Sarang VADNERKAR, Ullas PAZHAYAVEETIL, Eric J. KING