Patents by Inventor Richard A. Cross

Richard A. Cross 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).

  • Frequency modulation monitor circuit and method
    Patent number: 4694263
    Abstract: A method and apparatus for monitoring a frequency modulated signal including harmonically mixing the modulated signal with a significantly lower reference frequency, dividing the mixed signal, filtering out the reference frequency, rectifying and integrating the filtered frequency and then testing the integrated signal is disclosed. A correction signal responsive to the integrated signal is provided in one arrangement.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: September 15, 1987
    Assignee: Rockwell International Corporation
    Inventor: Richard A. Cross
  • Linearizer circuit for frequency modulation oscillator
    Patent number: 4675618
    Abstract: A system for frequency modulation by a signal, the system including an oscillator having a known linearity distortion, a circuit for selecting one from a plurality of predetermined constants, a circuit for operating on the signal with the selected constant, and a digital to analog converter in an embodiment where the signal is digital, for converting the signal having been operated on to an analog signal for modulating the oscillator is disclosed. One embodiment includes a circuit for determining the magnitude of the input signal.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: June 23, 1987
    Assignee: Rockwell International Corporation
    Inventor: Richard A. Cross