Patents by Inventor Marc L. Ranger

Marc L. Ranger 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).

  • High speed multiplying digital to analog converter
    Patent number: 4563670
    Abstract: A high speed four quadrant multiplier is current controlled and uses a high speed differential output current digital to analog converter. Independent adjustment of the multiplying factor without changing the DC offset is accomplished. Also a true zero input signal will cause a true zero output signal and the operation of the multiplier is extremely fast. The analog throughput of the multiplier is independent of the speed of the digital to analog converter.
    Type: Grant
    Filed: December 14, 1983
    Date of Patent: January 7, 1986
    Assignee: Tektronix, Inc.
    Inventors: Richard W. Stallkamp, Marc L. Ranger