Patents by Inventor Marta G. Zanchi

Marta G. Zanchi 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).

  • Frequency offset Cartesian feedback system
    Patent number: 8125270
    Abstract: An amplifier system providing improved Cartesian feedback is provided. A complex band pass error amplifier is provided. A quadrature up converter is connected to the complex band pass error amplifier so as to receive as input, output from the complex band pass error amplifier. An amplifier is connected to the quadrature up converter so as to receive as input, output from the quadrature up converter. A quadrature down converter is connected at or beyond the amplifier output so as to receive as input a signal proportional to that delivered by the amplifier as output to a load, wherein the complex band pass error amplifier is connected to the quadrature down converter so as to receive as a first input, output from the quadrature down converter and as a second input, a quadrature reference signal.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: February 28, 2012
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Marta G. Zanchi, Greig C. Scott
  • FREQUENCY OFFSET CARTESIAN FEEDBACK SYSTEM
    Publication number: 20100283538
    Abstract: An amplifier system providing improved Cartesian feedback is provided. A complex band pass error amplifier is provided. A quadrature up converter is connected to the complex band pass error amplifier so as to receive as input, output from the complex band pass error amplifier. An amplifier is connected to the quadrature up converter so as to receive as input, output from the quadrature up converter. A quadrature down converter is connected at or beyond the amplifier output so as to receive as input a signal proportional to that delivered by the amplifier as output to a load, wherein the complex band pass error amplifier is connected to the quadrature down converter so as to receive as a first input, output from the quadrature down converter and as a second input, a quadrature reference signal.
    Type: Application
    Filed: May 11, 2009
    Publication date: November 11, 2010
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Marta G. Zanchi, Greig C. Scott