Patents by Inventor Steve Picken

Steve Picken 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).

  • Calibrated quadrature very low intermediate frequency receiver
    Patent number: 7773965
    Abstract: The present invention is a quadrature VLIF receiver, including calibration circuitry, and methods to closely match signal processing of an in-phase signal path and a quadrature-phase signal path to optimize VLIF image rejection. The calibration circuitry includes a variable gain variable-phase calibration signal generator, a variable gain amplifier for each signal path, phase adjustment circuitry for each signal path, and switching circuitry to support calibration steps. The calibration signal generator supplies a calibration signal at the same frequency as mixer local oscillator signals; therefore, during calibration, all signals downstream of the VLIF mixer are at DC, which simplifies calibration measurements, thereby minimizing calibration times.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: August 10, 2010
    Assignee: RF Micro Devices, Inc.
    Inventors: Roger W. Van Brunt, Mark Alexander John Moffat, Steve Picken