Patents by Inventor Donald K. Krull

Donald K. Krull 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: 4516153
    Abstract: In a color TV receiver, a composite video signal processing circuit serves to prepare the signal input to a CCD comb filter, and includes a transistor phase splitter with a first load resistor connected to the transistor's collector electrode and a second load resistor connected to the transistor's emitter electrode. A reactance of a first sign couples the collector electrode to an output terminal, while a reactance of the opposite sign couples the emitter electrode to the same output terminal. A capacitor between the transistor's collector and base electrodes provides a negative feedback path for signal components. Parameter values are selected to provide the processing circuit with a peak response at a frequency above the frequency band occupied by the composite video signals. Processing circuit provides a substantially constant group delay for signal frequencies throughout the band, while compensating for decline at high signal frequencies of IF amplifier's amplitude-versus-frequency characteristic.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: May 7, 1985
    Assignee: RCA Corporation
    Inventors: Donald K. Krull, Saiprasad V. Naimpally