Patents by Inventor Manfred Ley

Manfred Ley 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 for generating two closely adjacent frequencies
    Patent number: 4904955
    Abstract: A circuit for generating two closely adjacent frequencies includes two oscillators each generating one of two closely adjacent frequencies. A PLL circuit is connected to the oscillators for regulating the frequencies. The PLL circuit performs a frequency comparison of the frequency generated by only one of the oscillators with a reference frequency to generate a frequency comparison output signal of the PLL circuit, and it regulates the frequencies of both of the oscillators as a function of the frequency comparison output signal of the PLL circuit.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: February 27, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventor: Manfred Ley