Patents by Inventor Herbert Radda

Herbert Radda 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).

  • Circuit arrangement for the wireless transmission of control signals to the control paths of controlled semiconductor valves
    Patent number: 3946389
    Abstract: The invention concerns a circuit arrangement for the wireless transmission of control signals to the control paths of controlled semiconductor valves, particularly of thyristors, which are preferably usable in a rectifier for high voltage. The control signals are provided for the modulation of a high-frequency transmitter which is disposed at some distance from high frequency receivers each containing a demodulator, whose output signal is delivered to the control path of a semiconductor valve. In order to ensure reliable and interference-proof firing of the semiconductor valves, if the distance between the high-frequency transmitter and the high-frequency receiver is large, there is provided, a frequency-modulated high-frequency transmitter as the high-frequency transmitter.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: March 23, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventors: Adolf Habock, Oskar Beckmann, Stefan Frese, Herbert Radda, Franz Mayerhofer, Karl-Friedrich Leowald