Patents by Inventor Shanthi Bhagavatheeswaran

Shanthi Bhagavatheeswaran 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).

  • Methods and apparatus to integrate image rejection into quadrature mixers
    Patent number: 7463862
    Abstract: Methods and apparatus to integrate image rejection into quadrature mixers are disclosed. A disclosed image-rejection quadrature mixer comprises a quadrature mixer, and a cross-coupled differential pair of transistors to provide a complex filter response, wherein the mixer and the transistors are integrated on a common silicon substrate.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: December 9, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Shanthi Bhagavatheeswaran, Srinivasan Venkatraman
  • Methods and apparatus to bias the backgate of a power switch
    Patent number: 7202729
    Abstract: Methods and apparatus to bias a backgate of a power switch while preventing latchup are disclosed. A disclosed method of biasing a backgate of a power switch comprises: if a voltage of a first power supply rises before a voltage of a second power supply, initially biasing the backgate with a voltage based on the first power supply; and if the voltage of the first power supply rises after the voltage of the second power supply, biasing the backgate with a voltage based on the second power supply.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: April 10, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Shanthi Bhagavatheeswaran, Srinivasan Venkatraman, Hugh Mair
  • Methods and apparatus to integrate image rejection into quadrature mixers
    Publication number: 20060281410
    Abstract: Methods and apparatus to integrate image rejection into quadrature mixers are disclosed. A disclosed image-rejection quadrature mixer comprises a quadrature mixer, and a cross-coupled differential pair of transistors to provide a complex filter response, wherein the mixer and the transistors are integrated on a common silicon substrate.
    Type: Application
    Filed: June 13, 2005
    Publication date: December 14, 2006
    Inventors: Shanthi Bhagavatheeswaran, Srinivasan Venkatraman
  • Methods and apparatus to bias the backgate of a power switch
    Publication number: 20060087361
    Abstract: Methods and apparatus to bias a backgate of a power switch while preventing latchup are disclosed. A disclosed method of biasing a backgate of a power switch comprises: if a voltage of a first power supply rises before a voltage of a second power supply, initially biasing the backgate with a voltage based on the first power supply; and if the voltage of the first power supply rises after the voltage of the second power supply, biasing the backgate with a voltage based on the second power supply.
    Type: Application
    Filed: October 21, 2004
    Publication date: April 27, 2006
    Inventors: Shanthi Bhagavatheeswaran, Srinivasan Venkatraman, Hugh Mair