Patents by Inventor Gerhard Thannhaeuser

Gerhard Thannhaeuser 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: 4675883
    Abstract: An arrangement for carrier recovery of two pulse shift keyed signals comprising a bandpass filter at the input which is followed by a series connection of a full-wave rectifier, a carrier frequency filter and a frequency divider is particularly characterized in that the input signal is converted into a push-pull signal in a transformer and employed for driving an emitter-coupled amplifier, two pairs of emitter-coupled transistors being connected in series between the input and a pair of operational amplifiers. A first of the operational amplifiers is connected to a voltage controlled oscillator. Its output is connected to a first frequency divider, the first frequency divider being connected to a further frequency divider for a further division of two for connection to a demodulator which receives the input signal.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: June 23, 1987
    Assignee: Siemens Aktiengesellschaft
    Inventors: Gerhard Thannhaeuser, Alfred Langer