Patents Assigned to Outram Research Ltd.
  • AC calibration apparatus
    Patent number: 6424277
    Abstract: AC calibration apparatus (2) comprising an analogue to digital converter (4), and in which the absolute gain of the analogue to digital converter (4) is dynamically assessed by applying a reference AC signal which is in addition to a sampling signal required for measurement purposes and which is a square wave of a known amplitude at a precise sub-harmonic of the sampling frequency of the analogue to digital converter (4).
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: July 23, 2002
    Assignee: Outram Research Ltd.
    Inventor: John Outram