Patents by Inventor Hidehiko Norimatu

Hidehiko Norimatu 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).

  • Phase locked loop frequency synthesizer
    Patent number: 5361044
    Abstract: In a PLL frequency synthesizer capable of minimizing power consumption in the power saving operation, there are disposed a voltage controlled oscillator, a phase detector, an active filter, a reference frequency oscillator, a dual modulus prescaler, and a pulse swallow counter having a modulus control terminal. In the power saving operation, the modulus control terminal is set to an inactive state by a controller to prevent power of a power source from being supplied via the pulse swallow counter to the dual modulus prescaler.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: November 1, 1994
    Assignee: NEC Corporation
    Inventors: Hidehiko Norimatu, Osamu Yamashita