Patents by Inventor Greg C. Richtenburg

Greg C. Richtenburg 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).

  • On-site, in-situ application calibration service
    Publication number: 20040220762
    Abstract: On-site, in-situ verification of production test equipment. Verification of production test equipment is performed using a mobile rack of electronic test equipment which may be moved through a production environment. Calibration tests are only performed on those measurements critical to the production environment, not over the operating range of the equipment. Calibration tests may be performed in parallel to reduce the time required.
    Type: Application
    Filed: May 2, 2003
    Publication date: November 4, 2004
    Inventors: Robert E. Oeflein, Glen C. Miller, Russell A. Caroli, Charles Warren Ford, David J. Robinson, Greg C. Richtenburg, James C. Harmon
  • Optical receiver zero calibration system and method
    Patent number: 6548802
    Abstract: A zero calibration system and method for an optical receiver include an illuminated photodetector, switchably coupled to an amplifier. The photodetector is de-coupled from the amplifier while illumination of the photodetector is maintained and an error signal is measured at the output of the amplifier The photodetector is then coupled to the amplifier and subsequent signals measured at the output of the amplifier are corrected according to the measured error signal, based on a comparison of the relative values of a feedback resistor, coupled between the output and an input of the amplifier, and an equivalent resistance of the photodetector. When the ratio of the feedback resistor to the equivalent resistance does not exceed a predetermined threshold, the subsequently measured signals at the output of the amplifier are corrected by offsetting the subsequently measured signals by the measured error signal.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: April 15, 2003
    Assignee: Agilent Technologies, Inc.
    Inventors: Mohan Gurunathan, Zoltan D. Azary, Greg C. Richtenburg
  • Optical receiver zero calibration system and method
    Publication number: 20020153475
    Abstract: A zero calibration system and method for an optical receiver include an illuminated photodetector, switchably coupled to an amplifier. The photodetector is de-coupled from the amplifier while illumination of the photodetector is maintained and an error signal is measured at the output of the amplifier The photodetector is then coupled to the amplifier and subsequent signals measured at the output of the amplifier are corrected according to the measured error signal, based on a comparison of the relative values of a feedback resistor, coupled between the output and an input of the amplifier, and an equivalent resistance of the photodetector. When the ratio of the feedback resistor to the equivalent resistance does not exceed a predetermined threshold, the subsequently measured signals at the output of the amplifier are corrected by offsetting the subsequently measured signals by the measured error signal.
    Type: Application
    Filed: April 20, 2001
    Publication date: October 24, 2002
    Inventors: Mohan Gurunathan, Zoltan D. Azary, Greg C. Richtenburg