Patents by Inventor Stanley R. Griswold, Jr.

Stanley R. Griswold, Jr. 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).

  • Patent number: 4761798
    Abstract: There is disclosed a Zero IF modulator apparatus for modulating carrier signals with baseband signals, the modulator includes digital logic circuitry including a sine/cosine amplitude converter which is responsive to the baseband signals for providing first and second digital quadrature baseband signals. These digital quadrature baseband signals are then employed by coupling the same to digital-to-analog converters where the outputs of each converter is indicative of a first and second quadrature signal. These signals can then be translated to a given carrier signal for transmission over a desired communication channel.
    Type: Grant
    Filed: April 2, 1987
    Date of Patent: August 2, 1988
    Assignee: ITT Aerospace Optical
    Inventors: Stanley R. Griswold, Jr., Bryan G. Mussatti