Patents by Inventor Vinod Mukundagiri
Vinod Mukundagiri 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: 10374659Abstract: A method, receiver and system for isolated wireless data transfer are disclosed. The receiver includes a switching mixer connected to receive a data signal and a local oscillator signal and to output a mixed differential signal, a programmable gain amplifier using an operational transconductance amplifier (OTA) and resistive feedback, the OTA connected to receive the mixed differential signal and to provide an amplified differential signal to a polyphase filter, and an analog demodulator to demodulate the output of the polyphase filter and provide digital output.Type: GrantFiled: April 28, 2016Date of Patent: August 6, 2019Assignee: Texas Instruments IncorporatedInventors: Vinod Mukundagiri, Sudipto Chakraborty
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Patent number: 10129059Abstract: A multi-amplitude modulation receiver includes a signal coupler block coupled to a mixer array block receiving a first input signal from the signal coupler block and a second input from a LO circuit that provides N overlapping phase signals. Outputs of the N mixer elements are coupled to a baseband filter (BBF) block then to a decision threshold block including decision threshold elements including a signal input and at least one comparator receiving at least one VTH value. A phase ordering and mapper block selects M out of the N phases. A digital logic and control block is coupled to control a filter gain and corner frequency of the BBF block and control the VTH value for the decision threshold block which compares a signal received to the VTH value. Outputs from the decision threshold block are coupled inputs of an M-input decision combiner which provides a single data output.Type: GrantFiled: May 17, 2017Date of Patent: November 13, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sudipto Chakraborty, Vinod Mukundagiri
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Patent number: 9941916Abstract: A programmable multi-band receiver includes a signal coupler, programmable signal scaler including a fixed capacitance part including a series set of switchable capacitor arrays positioned before Electrostatic Discharge (ESD) protecting circuitry coupled to a variable capacitance part after the ESD protecting circuitry, reconfigurable mixer array, then a baseband polyphase filter. The variable capacitance part includes a parallel set of paths each including a capacitor and at least one switch for setting a center frequency for band selection. The reconfigurable mixer array is coupled to receive phase signals from a local oscillator (LO) circuit and includes a plurality of mixer switch elements for providing image rejection. The received signal strength is adjusted by the programmable signal scaler so that the electrostatic discharge circuit (ESD) can operate without the need of a negative supply voltage.Type: GrantFiled: May 31, 2017Date of Patent: April 10, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sudipto Chakraborty, Vinod Mukundagiri
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Patent number: 9893716Abstract: Methods and circuitry for calibrating inductive-capacitive resonant circuits are disclosed. An example of the circuitry includes an inductive-capacitive (L-C) resonant circuit operable to receive signals in response to induced electromagnetic signals transmitted on a carrier frequency. A demodulator has a signal source and is operable to demodulate signals generated by the L-C resonant circuit. Switching circuitry is operable to inject signals generated by the signal source into the L-C resonant circuit during a calibration mode. The calibration mode is for adjusting the capacitance in the L-C resonant circuit to tune the L-C resonant circuit to the carrier frequency.Type: GrantFiled: October 13, 2016Date of Patent: February 13, 2018Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Sudipto Chakraborty, Vinod Mukundagiri
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Publication number: 20170353337Abstract: A multi-amplitude modulation receiver includes a signal coupler block coupled to a mixer array block receiving a first input signal from the signal coupler block and a second input from a LO circuit that provides N overlapping phase signals. Outputs of the N mixer elements are coupled to a baseband filter (BBF) block then to a decision threshold block including decision threshold elements including a signal input and at least one comparator receiving at least one VTH value. A phase ordering and mapper block selects M out of the N phases. A digital logic and control block is coupled to control a filter gain and corner frequency of the BBF block and control the VTH value for the decision threshold block which compares a signal received to the VTH value. Outputs from the decision threshold block are coupled inputs of an M-input decision combiner which provides a single data output.Type: ApplicationFiled: May 17, 2017Publication date: December 7, 2017Inventors: SUDIPTO CHAKRABORTY, VINOD MUKUNDAGIRI
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Publication number: 20170353205Abstract: A programmable multi-band receiver includes a signal coupler, programmable signal scaler including a fixed capacitance part including a series set of switchable capacitor arrays positioned before Electrostatic Discharge (ESD) protecting circuitry coupled to a variable capacitance part after the ESD protecting circuitry, reconfigurable mixer array, then a baseband polyphase filter. The variable capacitance part includes a parallel set of paths each including a capacitor and at least one switch for setting a center frequency for band selection. The reconfigurable mixer array is coupled to receive phase signals from a local oscillator (LO) circuit and includes a plurality of mixer switch elements for providing image rejection. The received signal strength is adjusted by the programmable signal scaler so that the electrostatic discharge circuit (ESD) can operate without the need of a negative supply voltage.Type: ApplicationFiled: May 31, 2017Publication date: December 7, 2017Inventors: SUDIPTO CHAKRABORTY, VINOD MUKUNDAGIRI
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Publication number: 20170117879Abstract: Methods and circuitry for calibrating inductive-capacitive resonant circuits are disclosed. An example of the circuitry includes an inductive-capacitive (L-C) resonant circuit operable to receive signals in response to induced electromagnetic signals transmitted on a carrier frequency. A demodulator has a signal source and is operable to demodulate signals generated by the L-C resonant circuit. Switching circuitry is operable to inject signals generated by the signal source into the L-C resonant circuit during a calibration mode. The calibration mode is for adjusting the capacitance in the L-C resonant circuit to tune the L-C resonant circuit to the carrier frequency.Type: ApplicationFiled: October 13, 2016Publication date: April 27, 2017Inventors: Sudipto Chakraborty, Vinod Mukundagiri
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Publication number: 20170104508Abstract: A method, receiver and system for isolated wireless data transfer are disclosed. The receiver includes a switching mixer connected to receive a data signal and a local oscillator signal and to output a mixed differential signal, a programmable gain amplifier using an operational transconductance amplifier (OTA) and resistive feedback, the OTA connected to receive the mixed differential signal and to provide an amplified differential signal to a polyphase filter, and an analog demodulator to demodulate the output of the polyphase filter and provide digital output.Type: ApplicationFiled: April 28, 2016Publication date: April 13, 2017Inventors: Vinod Mukundagiri, Sudipto Chakraborty
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Patent number: 9088158Abstract: One embodiment includes a power system. The system includes a power switch device that is activated to provide an output voltage to a load in response to an input voltage. The power switch device includes a control terminal and a bulk connection. The system also includes a reverse voltage control circuit configured to passively couple the input voltage to one of the control terminal and the bulk connection in response to a reverse voltage condition in which an amplitude of the input voltage becomes negative. The system further includes an output shutoff circuit configured to passively couple the output voltage to a neutral-voltage rail during the reverse voltage condition.Type: GrantFiled: December 5, 2013Date of Patent: July 21, 2015Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Kenneth J. Maggio, Umar Jameer Lyles, John H. Carpenter, Jr., J. Randall Cooper, Vinod Mukundagiri
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Publication number: 20140160600Abstract: One embodiment includes a power system. The system includes a power switch device that is activated to provide an output voltage to a load in response to an input voltage. The power switch device includes a control terminal and a bulk connection. The system also includes a reverse voltage control circuit configured to passively couple the input voltage to one of the control terminal and the bulk connection in response to a reverse voltage condition in which an amplitude of the input voltage becomes negative. The system further includes an output shutoff circuit configured to passively couple the output voltage to a neutral-voltage rail during the reverse voltage condition.Type: ApplicationFiled: December 5, 2013Publication date: June 12, 2014Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: KENNETH J. MAGGIO, Umar Jameer Lyles, John H. Carpenter, JR., J. Randall Cooper, Vinod Mukundagiri
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Patent number: 7701301Abstract: Systems and methods for implementing a temperature compensated two-stage ring oscillator are described. At least one embodiment includes a system for generating a clock signal comprising a self-starting oscillator comprising two delay stages in a ring configuration. The two-stage ring oscillator is configured to generate the clock signal, wherein the delay stages are configured such that the two-stage ring oscillator has a single right-half plane (RHP) pole in each of the two delay stages where feedback is always positive. For some embodiments, the system further comprises a compensation module configured to sense temperature and process variations and adjust a supply voltage for the two-stage ring oscillator to compensate for temperature and process variations in order to maintain a constant frequency clock signal. For such embodiments, the compensation module comprises a replica circuit configured to mirror operation of the n-channel devices within the two-stage ring oscillator.Type: GrantFiled: September 11, 2007Date of Patent: April 20, 2010Assignee: Conexant Systems, Inc.Inventors: Kadaba Lakshmikumar, Vinod Mukundagiri
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Publication number: 20080061893Abstract: Systems and methods for implementing a temperature compensated two-stage ring oscillator are described. At least one embodiment includes a system for generating a clock signal comprising a self-starting oscillator comprising two delay stages in a ring configuration. The two-stage ring oscillator is configured to generate the clock signal, wherein the delay stages are configured such that the two-stage ring oscillator has a single right-half plane (RHP) pole in each of the two delay stages where feedback is always positive. For some embodiments, the system further comprises a compensation module configured to sense temperature and process variations and adjust a supply voltage for the two-stage ring oscillator to compensate for temperature and process variations in order to maintain a constant frequency clock signal. For such embodiments, the compensation module comprises a replica circuit configured to mirror operation of the n-channel devices within the two-stage ring oscillator.Type: ApplicationFiled: September 11, 2007Publication date: March 13, 2008Applicant: CONEXANT SYSTEMS, INC.Inventors: Kadaba Lakshmikumar, Vinod Mukundagiri