Patents by Inventor Kazuhiko Takaya

Kazuhiko Takaya 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).

  • Frequency shift keying demodulation circuit using logic circuitry
    Patent number: 5783967
    Abstract: A miniaturized FSK demodulation circuit for accurately demodulating a signal having a small modulation index comprises a multiplier for multiplying a FSK modulated input signal by 4, an oscillator for generating a first signal having the same frequency and phase as the input signal, a phase shifter for producing a second signal by phase shifting the first signal by 90.degree.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: July 21, 1998
    Assignee: Seiko Instruments Inc.
    Inventor: Kazuhiko Takaya