Patents by Inventor Siddharth Maru
Siddharth Maru 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: 20200064160Abstract: A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor, and a filter communicatively coupled to the measurement circuit. The measurement circuit may be 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. The filter may be configured to isolate changes to the displacement which are significantly slower than an expected change to the displacement in response to a human interaction with the mechanical member.Type: ApplicationFiled: August 6, 2019Publication date: February 27, 2020Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Siddharth MARU, Tejasvi DAS, Zhong YOU, Johann G. GABORIAU, Matthew BEARDSWORTH, Gregory C. YANCEY
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Publication number: 20190386561Abstract: 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.Type: ApplicationFiled: June 14, 2019Publication date: December 19, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Eric J. KING, Siddharth MARU, Thomas HOFF, Graeme G. MACKAY
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Patent number: 10461640Abstract: An apparatus may include a power converter having a power supply input for receiving an input power supply voltage generated by a power supply, an output for generating an output voltage to a load, and a power inductor coupled between the power supply input and the output may and further include an energy storage element coupled to the power supply input, the power inductor, and the output such that operation of the power inductor is split temporally between delivering energy to the energy storage element and delivering energy to the load, and operation of the energy storage element is split temporally between delivering energy to the load and receiving energy from one or both of the power supply and the load.Type: GrantFiled: October 3, 2016Date of Patent: October 29, 2019Assignee: Cirrus Logic, Inc.Inventors: Eric J. King, Siddharth Maru, John L. Melanson
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Publication number: 20190302923Abstract: 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.Type: ApplicationFiled: March 6, 2019Publication date: October 3, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Siddharth MARU, Tejasvi DAS, Luke LAPOINTE, Srdjan MARIJANOVIC, Zhong YOU, Drew KINNEY, Anthony S. DOY, Eric J. KING
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Publication number: 20190302161Abstract: 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.Type: ApplicationFiled: February 4, 2019Publication date: October 3, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Zhong YOU, Siddharth MARU, Tejasvi DAS, Luke LAPOINTE, Eric J. KING, Anthony S. DOY, Srdjan MARJIANOVIC, Drew KINNEY, Matthew BEARDSWORTH, Emmanuel MARCHAIS
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Publication number: 20190302890Abstract: A system may include a tactile actuator for providing tactile feedback and a resonant phase sensing system. The resonant phase sensing system may include a resistive-inductive-capacitive sensor and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and the tactile actuator. The resistive-inductive-capacitive sensor may be configured to measure phase information associated with the resistive-inductive-capacitive sensor, based on the phase information, detect an indication of human interaction with the system proximate to the resistive-inductive-capacitive sensor, and trigger the tactile actuator to generate tactile feedback responsive to detecting the indication of human interaction.Type: ApplicationFiled: March 6, 2019Publication date: October 3, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Srdjan MARIJANOVIC, Drew KINNEY, Luke LAPOINTE, Siddharth MARU, Tejasvi DAS, Anthony S. DOY, Zhong YOU
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Publication number: 20190302193Abstract: A system may include a resonant phase sensing system comprising a resistive-inductive-capacitive sensor and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor, and a compensation circuit. The measurement circuit may be configured to use a phase detector to measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a metal plate relative to the resistive-inductive-capacitive sensor. The compensation circuit may be configured to detect a change in a physical property associated with the resistive-inductive-capacitive sensor other than the displacement and compensate the phase information to correct for the change in the physical property.Type: ApplicationFiled: March 15, 2019Publication date: October 3, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Siddharth MARU, Tejasvi DAS, Zhong YOU
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Publication number: 20190302922Abstract: A system may include a resistive-inductive-capacitive sensor, 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. The system may also include a Q factor enhancer communicatively coupled to the resistive-inductive-capacitive sensor and configured to control a Q factor of the resistive-inductive-capacitive sensor.Type: ApplicationFiled: March 6, 2019Publication date: October 3, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Tejasvi DAS, Siddharth MARU, Zhong YOU, Luke LAPOINTE
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Publication number: 20190140540Abstract: In accordance with embodiments of the present disclosure, an apparatus may include a power converter having a power supply input for receiving an input power supply voltage generated by a power supply, an output for generating an output voltage to a load, and a power inductor coupled between the power supply input and the output may and further include an energy storage element coupled to the power supply input, the power inductor, and the output such that operation of the power inductor is split temporally between delivering energy to the energy storage element and delivering energy to the load, and operation of the energy storage element is split temporally between delivering energy to the load and receiving energy from one or both of the power supply and the load.Type: ApplicationFiled: January 3, 2019Publication date: May 9, 2019Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Eric J. KING, Siddharth MARU, John L. MELANSON
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Patent number: 10187934Abstract: An electronic system and method include a controller to actively control transfer of excess energy to an auxiliary-winding of an auxiliary power dissipation circuit. The excess energy is a transfer of energy from a primary winding of a switching power converter to the auxiliary-winding of the auxiliary power dissipation circuit. In at least one embodiment, the electronic system is a lighting system that includes a triac-based dimmer. The excess energy is energy drawn through the primary-side winding of the switching power converter to provide operational compatibility between a dimmer through which a power supply provides energy to the switching power converter and a load to which the switching power converter provides energy.Type: GrantFiled: March 14, 2014Date of Patent: January 22, 2019Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: John L. Melanson, Prashanth Drakshapalli, Siddharth Maru, Rahul Singh
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Patent number: 10177657Abstract: A switching power stage for producing an output voltage to a load may include a configurable switched mode power converter and a controller. The power converter may include 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, the output comprising a first output terminal and a second output terminal. The controller may be configured to, for at least one range of magnitudes of the output voltage, control the plurality of switches to operate in at least three switching phases per switching cycle of the power converter in order to generate the output voltage, wherein switching cycles of the power converter are substantially approximately equal in period and control the plurality of switches to apply for each of the at least three switching phases a respective switch configuration of the plurality of switch configurations.Type: GrantFiled: April 15, 2016Date of Patent: January 8, 2019Assignee: Cirrus Logic, Inc.Inventors: Eric J. King, Siddharth Maru, John L. Melanson
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Patent number: 10122282Abstract: An electronic system and method include a controller to actively control power transfer from a primary winding of a switching power converter to an auxiliary-winding of an auxiliary power supply. The switching power converter is controlled and configured such that during transfer of power to the auxiliary-winding, the switching power converter does not transfer charge to one or more secondary-windings of the switching power converter. Thus, the switching power converter isolates one or more secondary transformer winding currents from an auxiliary-winding current. By isolating the charge delivered to the one or more secondary-windings from charge delivered to the auxiliary-winding, the controller can accurately determine an amount of charge delivered to the secondary-windings and, thus, to a load.Type: GrantFiled: October 28, 2016Date of Patent: November 6, 2018Assignee: PHILIPS LIGHTING HOLDING B.V.Inventors: John L. Melanson, Prashanth Drakshapalli, Siddharth Maru
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Patent number: 10090814Abstract: A signal processing system for producing a load voltage at a load output of the signal processing system, wherein the load output comprises a first load terminal having a first load voltage and a second load terminal having a second load voltage such that the load voltage comprises a difference between the first load voltage and the second load voltage, and may include a first processing path configured to process a first signal derived from an input signal to generate the first load voltage at a first processing path output, a second processing path configured to process a second signal received at a second processing path input and derived from the input signal, wherein the second signal comprises information of the input signal absent from the first signal, to generate the second load voltage at a second processing path output, and a high-pass filter coupled between the first processing path output and the second processing path input.Type: GrantFiled: September 20, 2016Date of Patent: October 2, 2018Assignee: Cirrus Logic, Inc.Inventors: John L. Melanson, Eric J. King, Zhaohui He, Siddharth Maru
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Publication number: 20180152101Abstract: 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 and a controller configured to control an output power of the charge pump to ensure that an input current of the charge pump is maintained below a current limit.Type: ApplicationFiled: November 27, 2017Publication date: May 31, 2018Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Eric J. KING, Siddharth MARU
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Patent number: 9985587Abstract: A switching power stage for producing a load voltage at a load output of the switching power stage, wherein the load output comprises a first load terminal having a first load voltage and a second load terminal having a second load voltage such that the load voltage comprises a difference between the first and the second load voltages, that may include: a power converter comprising a power inductor and a plurality of switches, wherein the power converter is configured to drive a power converter output terminal; a linear amplifier configured to drive a linear amplifier output terminal; and a controller for controlling the plurality of switches and the linear amplifier in order to generate the load voltage as a function of an input signal to the controller such that energy delivered to the load output is supplied predominantly by the power converter.Type: GrantFiled: May 31, 2016Date of Patent: May 29, 2018Assignee: Cirrus Logic, Inc.Inventors: Zhaohui He, Eric J. King, Siddharth Maru, John L. Melanson
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Patent number: 9973156Abstract: A method may include processing a first signal derived from an input signal with a first path to generate a first path voltage at a first path output, processing a second signal derived from the input signal with a second path to generate a second path voltage at a second path output, the second path comprising a linear amplifier having at least one transistor for driving the second path voltage, generating the first signal and the second signal with a signal splitter, such that the second signal comprises information of the input signal absent from the first signal, and such that the second path voltage is of a sufficient magnitude such that the at least one transistor operates in a saturation region of the at least one transistor throughout a dynamic range of a load voltage equal to the difference of the first path voltage and the second path voltage.Type: GrantFiled: October 4, 2016Date of Patent: May 15, 2018Assignee: Cirrus Logic, Inc.Inventors: Eric J. King, Zhaohui He, John L. Melanson, Siddharth Maru
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Patent number: 9929664Abstract: A method may include controlling switches of a switching full-bridge of a signal processing system to commutate polarity of a capacitor with respect to the first processing path output and a second processing path output of the signal processing system in response to a condition for commutating connectivity of the switching full-bridge and inserting a feedforward compensation that bypasses a loop filter of the second processing path in order to prevent discontinuities caused by commutating polarity of the capacitor from being compensated by the loop filter.Type: GrantFiled: September 30, 2016Date of Patent: March 27, 2018Assignee: Cirrus Logic, Inc.Inventors: Eric J. King, Zhaohui He, Siddharth Maru, John L. Melanson
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Patent number: 9906196Abstract: A switching power stage for producing a load voltage may include a first processing path having a first output, a second processing path having a second output, a first plurality of switches comprising at least a first switch coupled between the first output and a first load terminal and a second switch coupled between the first output and the second load terminal, a second plurality of switches comprising at least a third switch coupled between the second output and the first load terminal and a fourth switch coupled between the second output and the second load terminal, and a controller configured to control switches in order to generate the load voltage as a function of an input signal such that one of the first switch and the second switch operates in a linear region of operation and one of the third switch and the fourth switch operates in a saturated region of operation for a predominance of a dynamic rage of the load voltage.Type: GrantFiled: September 20, 2016Date of Patent: February 27, 2018Assignee: Cirrus Logic, Inc.Inventors: Zhaohui He, Eric J. King, Siddharth Maru, John L. Melanson
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Publication number: 20170271996Abstract: A method may include controlling switches of a switching full-bridge of a signal processing system to commutate polarity of a capacitor with respect to the first processing path output and a second processing path output of the signal processing system in response to a condition for commutating connectivity of the switching full-bridge and inserting a feedforward compensation that bypasses a loop filter of the second processing path in order to prevent discontinuities caused by commutating polarity of the capacitor from being compensated by the loop filter.Type: ApplicationFiled: September 30, 2016Publication date: September 21, 2017Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: Eric J. KING, Zhaohui HE, Siddharth MARU, John L. MELANSON
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Publication number: 20170272044Abstract: A signal processing system for producing a load voltage at a load output of the signal processing system, wherein the load output comprises a first load terminal having a first load voltage and a second load terminal having a second load voltage such that the load voltage comprises a difference between the first load voltage and the second load voltage, and may include a first processing path configured to process a first signal derived from an input signal to generate the first load voltage at a first processing path output, a second processing path configured to process a second signal received at a second processing path input and derived from the input signal, wherein the second signal comprises information of the input signal absent from the first signal, to generate the second load voltage at a second processing path output, and a high-pass filter coupled between the first processing path output and the second processing path input.Type: ApplicationFiled: September 20, 2016Publication date: September 21, 2017Applicant: Cirrus Logic International Semiconductor Ltd.Inventors: John L. MELANSON, Eric J. KING, Zhaohui HE, Siddharth MARU