Patents by Inventor John J. Pupich

John J. Pupich 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).

  • Automatic low frequency gain limited circuit for eliminating signal suppression in an A-C coupled video processing system
    Patent number: 3975586
    Abstract: A means of eliminating signal suppression in an A-C coupled video process system by an automatic low frequency gain limiting circuit means. The low frequency gain limiting circuit means comprises a summing amplifier that simultaneously sums the original video pulses and inverted pulses of the low frequency pedestal portion of the video pulses with the detail information removed therefrom. The resulting gain limited output video voltage from the summing amplifier is confined within the linear dynamic range of the video processing system and comprises a compressed pedestal height that nevertheless has all the detail information thereon. The gain limited output video voltage is applied to a display driver.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: August 17, 1976
    Assignee: The United States of America as represnted by the Secretary of the Army
    Inventors: Sen-Te Chow, John J. Pupich