Patents Examined by Mare S. Hoff
  • Analog to digital converter using an integrator having a partially controlled output signal
    Patent number: 4939520
    Abstract: The present invention provides an analog to digital converter, including an integrator for producing an output signal and having an input, a connection for an input signal to the integrator input, and a controller for periodically applying a reference signal to the integrator input for causing the integrator output signal to have a predetermined average value, for measuring the amount of time that the reference is applied to the integrator input, and for calculating a digital representation of the analog signal.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: July 3, 1990
    Assignee: Analogic Corporation
    Inventor: James W. Biglow