Patents by Inventor Ramesh Chokkalingam

Ramesh Chokkalingam 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).

  • Electronic circuit
    Patent number: 7626469
    Abstract: An electric circuit, for use in a phase lock loop circuit, the electric circuit comprising: a first circuit element, being a phase frequency detector or a charge pump; at least one LC resonant loop, the first circuit element forming part of the loop; and means arranged to reduce ringing in said at least one LC resonant loop.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: December 1, 2009
    Assignee: GloNav Ltd.
    Inventors: Ramesh Chokkalingam, Matteo Conta
  • ELECTRONIC CIRCUIT
    Publication number: 20090261875
    Abstract: An electric circuit, for use in a phase lock loop circuit, the electric circuit comprising: a first circuit element, being a phase frequency detector or a charge pump; at least one LC resonant loop, the first circuit element forming part of the loop; and means arranged to reduce ringing in said at least one LC resonant loop.
    Type: Application
    Filed: April 17, 2008
    Publication date: October 22, 2009
    Inventors: Ramesh Chokkalingam, Matteo Conta
  • Quadrature VCO system and method
    Patent number: 7394321
    Abstract: A low-power quadrature generator is provided for accurately generating in-phase signals and quadrature signals.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: July 1, 2008
    Assignee: GloNav Limited
    Inventors: Matteo Conta, Ramesh Chokkalingam, David A. Weldon
  • Quadrature VCO system and method
    Publication number: 20070268075
    Abstract: A low-power quadrature generator is provided for accurately generating in-phase signals and quadrature signals.
    Type: Application
    Filed: March 30, 2005
    Publication date: November 22, 2007
    Inventors: Matteo Conta, Ramesh Chokkalingam, David Weldon
  • Apparatus to decrease the spurs level in a phase-locked loop
    Publication number: 20030038661
    Abstract: A charge pump is disclosed including an output capacitive element to store an output voltage, a charging current source to charge the output capacitive element, a charging switching element to couple a first bias voltage to the charging current source in response to a charging signal, a discharging current source to discharge the output capacitive element, a discharging switching element to couple a second bias voltage to the discharging current source in response to a discharging signal, a unity gain amplifier to generate an amplifier voltage substantially equal to the output voltage, a first switching element to couple the amplifier voltage to the charging current source in response to a leakage prevention signal; and a second switching element to couple the amplifier voltage to the discharging current source in response to the leakage prevention signal.
    Type: Application
    Filed: July 26, 2002
    Publication date: February 27, 2003
    Inventors: Ramesh Chokkalingam, Matteo Conta, Farbod Behbahani