Patents by Inventor Hans-Wilhelm Zappen

Hans-Wilhelm Zappen 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).

  • Video signal noise reduction circuit
    Patent number: 4851911
    Abstract: High-frequency portions of the video signals are substantially damped at low signal levels by including, selectively, a low-pass filter (12) in circuit with a signal path, selectively, in accordance with the setting of a transfer switch (13), the setting of which is controlled as a function of the signal level with respect to a threshold (U.sub.St), which may vary, for example in accordance with amplification of a signal being received from a television camera tube system (1,2,3).
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: July 25, 1989
    Assignee: Robert Bosch GmbH
    Inventors: Klaus D. Muller, Ernst Rau, Hans-Wilhelm Zappen
  • Method and circuit for reading-out data from a television pickup (image sensor)
    Patent number: 4292653
    Abstract: A method and circuitry for reading out data from a TV pickup (image sensor) designed for the 525-line television standard, and operated in accordance with a line interlace process by once-repeated read-out of each line. In order to adapt the TV pickup (image sensor) to a 625-line television standard, every third line scan is repeated twice, i.e., every third line is read out three times.Both analog and digital circuits are presented.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: September 29, 1981
    Assignee: Robert Bosch GmbH
    Inventors: Gerd Bock, Herbert Zettl, Hans-Wilhelm Zappen, Friedrich Zimmermann