Patents by Inventor Vishnu Srinivasan

Vishnu Srinivasan 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).

  • Non-linear capacitance compensation
    Patent number: 8907727
    Abstract: Embodiments are directed to capacitance compensation via a compensation device coupled to a gain device to compensate for a capacitance change occurring due to an input signal change, along with a controller coupled to the compensation device to receive the input signal and to control an amount of compensation based on the input signal. In some embodiments, banks may be formed of multiple compensation devices, where each of the banks has a different size and is coupled to receive a different set of bias voltages.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: December 9, 2014
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Anil Samavedam, David E. Bockelman, Vishnu Srinivasan, Eric Kimball
  • Compensating for non-linear capacitance effects in a power amplifier
    Publication number: 20140295776
    Abstract: In one implementation, a power amplifier may include a gain device to receive an input signal and to output an amplified signal, and a compensation device coupled to the gain device to compensate for a change in a capacitance of the gain device occurring due to a change in the input signal. The power amplifier may be formed using a complementary metal oxide semiconductor (CMOS) process.
    Type: Application
    Filed: June 11, 2014
    Publication date: October 2, 2014
    Inventors: David E. Bockelman, Vishnu Srinivasan
  • Partitioned radio-frequency apparatus and associated methods
    Patent number: 8843080
    Abstract: Radio-frequency (RF) apparatus includes receiver analog circuitry that receives an RF signal and provides at least one digital signal to receiver digital circuitry that functions in cooperation with the receiver analog circuitry. The receiver analog circuitry and the receiver digital circuitry are partitioned so that interference effects between the receiver analog circuitry and the receiver digital circuitry tend to be reduced.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: September 23, 2014
    Assignee: Silicon Laboratories Inc.
    Inventors: Donald Kerth, Richard Behrens, Jeffrey Scott, G. Diwakar Vishakhadatta, G. Tyson Tuttle, Vishnu Srinivasan
  • Partitioned radio-frequency apparatus and associated methods
    Publication number: 20140256279
    Abstract: Radio-frequency (RF) apparatus includes receiver analog circuitry that receives an RF signal and provides at least one digital signal to receiver digital circuitry that functions in cooperation with the receiver analog circuitry. The receiver analog circuitry and the receiver digital circuitry are partitioned so that interference effects between the receiver analog circuitry and the receiver digital circuitry tend to be reduced.
    Type: Application
    Filed: May 21, 2014
    Publication date: September 11, 2014
    Applicant: Silicon Laboratories Inc.
    Inventors: Donald A. Kerth, Richard T. Behrens, Jeffrey W. Scott, G. Diwakar Vishakhadatta, G. Tyson Tuttle, Vishnu Srinivasan
  • Compensating for non-linear capacitance effects in a power amplifier
    Patent number: 8787850
    Abstract: In one implementation, a power amplifier may include a gain device to receive an input signal and to output an amplified signal, and a compensation device coupled to the gain device to compensate for a change in a capacitance of the gain device occurring due to a change in the input signal. The power amplifier may be formed using a complementary metal oxide semiconductor (CMOS) process.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: July 22, 2014
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: David E. Bockelman, Vishnu Srinivasan
  • Power Amplifier Having An Integrated Microcontroller
    Publication number: 20140100002
    Abstract: In an embodiment, a power amplifier (PA) includes a signal processing path including gain stages to receive a radio frequency (RF) signal and to output an amplified RF signal, sensors coupled to the signal processing path each to sense a characteristic of operation of the PA, and a microcontroller configured to execute instructions and to receive the operation characteristic(s) and to control one or more parameters of the signal processing path responsive this operation characteristic.
    Type: Application
    Filed: October 9, 2012
    Publication date: April 10, 2014
    Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Timothy Dupuis, Eric Kimball, David Bockelman, Vishnu Srinivasan, Justin Dougherty
  • Non-Linear Capacitance Compensation
    Publication number: 20130154744
    Abstract: Embodiments are directed to capacitance compensation via a compensation device coupled to a gain device to compensate for a capacitance change occurring due to an input signal change, along with a controller coupled to the compensation device to receive the input signal and to control an amount of compensation based on the input signal. In some embodiments, banks may be formed of multiple compensation devices, where each of the banks has a different size and is coupled to receive a different set of bias voltages.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 20, 2013
    Inventors: Anil Samavedam, David E. Bockelman, Vishnu Srinivasan, Eric Kimball
  • Non-linear capacitance compensation
    Patent number: 8344808
    Abstract: Embodiments are directed to capacitance compensation via a compensation device coupled to a gain device to compensate for a capacitance change occurring due to an input signal change, along with a controller coupled to the compensation device to receive the input signal and to control an amount of compensation based on the input signal. In some embodiments, banks may be formed of multiple compensation devices, where each of the banks has a different size and is coupled to receive a different set of bias voltages.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: January 1, 2013
    Assignee: Javelin Semiconductor, Inc.
    Inventors: Anil Samavedam, David E. Bockelman, Vishnu Srinivasan, Eric Kimball
  • Generating a process and temperature tracking bias voltage
    Patent number: 8219049
    Abstract: In one embodiment, a method includes generating a current that is proportional to a mobility and an oxide capacitance of a tracking device and independent of a threshold voltage variation of the tracking device, generating a voltage from the current, and providing the voltage as at least part of a bias voltage for another device. In one embodiment, this other device may be a compensation circuit coupled to a main device to compensate for capacitance non-linearity of the main device.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: July 10, 2012
    Assignee: Javelin Semiconductor, Inc.
    Inventors: Anil Samavedam, David E. Bockelman, Vishnu Srinivasan
  • Supply control for multiple power modes of a power amplifier
    Patent number: 8160520
    Abstract: In one embodiment, the present invention includes an apparatus having at least two gain stages to receive incoming signals and to output amplified signals, along with multiple regulators. More specifically, a linear regulator can be coupled to the first gain stage to provide a first regulated voltage to the first gain stage, and a switching regulator coupled to the second gain stage to provide a second regulated voltage to the second gain stage.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: April 17, 2012
    Assignee: Javelin Semiconductor, Inc.
    Inventors: Vishnu Srinivasan, David E. Bockelman
  • NON-LINEAR CAPACITANCE COMPENSATION
    Publication number: 20110074509
    Abstract: Embodiments are directed to capacitance compensation via a compensation device coupled to a gain device to compensate for a capacitance change occurring due to an input signal change, along with a controller coupled to the compensation device to receive the input signal and to control an amount of compensation based on the input signal. In some embodiments, banks may be formed of multiple compensation devices, where each of the banks has a different size and is coupled to receive a different set of bias voltages.
    Type: Application
    Filed: September 24, 2010
    Publication date: March 31, 2011
    Inventors: ANIL SAMAVEDAM, David E. Bockelman, Vishnu Srinivasan, Eric Kimball
  • Providing pre-distortion to an input signal
    Patent number: 7872528
    Abstract: In one implementation, the present invention includes a diode device to receive an incoming radio frequency (RF) signal to be amplified in a gain device of an amplifier and to provide a pre-distorted signal. Based on this pre-distorted signal, the gain device can output an amplified RF signal having substantial linearity to the incoming RF signal.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: January 18, 2011
    Assignee: Javelin Semiconductor, Inc.
    Inventors: David E. Bockelman, Vishnu Srinivasan
  • Output gain stage for a power amplifier
    Patent number: 7768350
    Abstract: In one embodiment, the present invention includes multiple gain stages to receive and amplify a differential input signal at different common mode voltages. The stages each may include a pair of linear NMOS gain transistors coupled to a primary coil of a given output transformer. One of the stages may include commonly coupled terminals coupled to a center tap of the primary coil of an output transformer of another stage, and a supply current provided to one of the stages is re-used for the other stage(s).
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: August 3, 2010
    Assignee: Javelin Semiconductor, Inc.
    Inventors: Vishnu Srinivasan, David E. Bockelman
  • OUTPUT GAIN STAGE FOR A POWER AMPLIFIER
    Publication number: 20100164621
    Abstract: In one embodiment, the present invention includes multiple gain stages to receive and amplify a differential input signal at different common mode voltages. The stages each may include a pair of linear NMOS gain transistors coupled to a primary coil of a given output transformer. One of the stages may include commonly coupled terminals coupled to a center tap of the primary coil of an output transformer of another stage, and a supply current provided to one of the stages is re-used for the other stage(s).
    Type: Application
    Filed: December 30, 2008
    Publication date: July 1, 2010
    Inventors: Vishnu Srinivasan, David E. Bockelman
  • Controlling power with an output network
    Patent number: 7728661
    Abstract: In one embodiment, the present invention includes multiple gain stages and an output network coupled to the gain stages. Each of the gain stages can be independently controlled to amplify a radio frequency (RF) signal to an output power level for transmission from a mobile wireless device. When controlled to be inactive, at least one of the gain stages can be placed into a low impedance state.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: June 1, 2010
    Assignee: Javelin Semiconductor, Inc.
    Inventors: David E. Bockelman, Vishnu Srinivasan
  • Generating A Process And Temperature Tracking Bias Voltage
    Publication number: 20100085119
    Abstract: In one embodiment, a method includes generating a current that is proportional to a mobility and an oxide capacitance of a tracking device and independent of a threshold voltage variation of the tracking device, generating a voltage from the current, and providing the voltage as at least part of a bias voltage for another device. In one embodiment, this other device may be a compensation circuit coupled to a main device to compensate for capacitance non-linearity of the main device.
    Type: Application
    Filed: October 14, 2009
    Publication date: April 8, 2010
    Inventors: Anil Samavedam, David E. Bockelman, Vishnu Srinivasan
  • Supply control for multiple power modes of a power amplifier
    Publication number: 20090278609
    Abstract: In one embodiment, the present invention includes an apparatus having at least two gain stages to receive incoming signals and to output amplified signals, along with multiple regulators. More specifically, a linear regulator can be coupled to the first gain stage to provide a first regulated voltage to the first gain stage, and a switching regulator coupled to the second gain stage to provide a second regulated voltage to the second gain stage.
    Type: Application
    Filed: May 9, 2008
    Publication date: November 12, 2009
    Inventors: Vishnu Srinivasan, David E. Bockelman
  • Controlling power with an output network
    Publication number: 20090273397
    Abstract: In one embodiment, the present invention includes multiple gain stages and an output network coupled to the gain stages. Each of the gain stages can be independently controlled to amplify a radio frequency (RF) signal to an output power level for transmission from a mobile wireless device. When controlled to be inactive, at least one of the gain stages can be placed into a low impedance state.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 5, 2009
    Inventors: David E. Bockelman, Vishnu Srinivasan
  • Providing pre-distortion to an input signal
    Publication number: 20090256631
    Abstract: In one implementation, the present invention includes a diode device to receive an incoming radio frequency (RF) signal to be amplified in a gain device of an amplifier and to provide a pre-distorted signal. Based on this pre-distorted signal, the gain device can output an amplified RF signal having substantial linearity to the incoming RF signal.
    Type: Application
    Filed: April 10, 2008
    Publication date: October 15, 2009
    Inventors: David E. Bockelman, Vishnu Srinivasan
  • Compensating for non-linear capacitance effects in a power amplifier
    Publication number: 20090243727
    Abstract: In one implementation, a power amplifier may include a gain device to receive an input signal and to output an amplified signal, and a compensation device coupled to the gain device to compensate for a change in a capacitance of the gain device occurring due to a change in the input signal. The power amplifier may be formed using a complementary metal oxide semiconductor (CMOS) process.
    Type: Application
    Filed: March 31, 2008
    Publication date: October 1, 2009
    Inventors: David E. Bockelman, Vishnu Srinivasan