Patents by Inventor Norihumi Komatu

Norihumi Komatu 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).

  • Bit synchronization circuit
    Patent number: 5022057
    Abstract: A telephone exchange system has a plurality of bit synchronization circuit each provided for an individual subscriber's line. A single clock generating circuit which generates a plurality of clocks is provided in common to the plurality of bit synchronization circuits. The bit synchronization circuit selects one clock of a phase suitable for regenerating an input data signal among the plurality of clocks applied thereto by the clock generating circuit, and regenerates and phases the input data signal by using the selected clock.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: June 4, 1991
    Assignees: Hitachi, Ltd., Hitachi Communication Systems, Inc.
    Inventors: Yumiko Nishi, Yutaka Torii, Norihumi Komatu, Seiichi Takaki