Patents by Inventor Yasuhiro Arasawa

Yasuhiro Arasawa 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).

  • Clock reproducing method and receiving clock producing apparatus allowing for absorption of transmission channel jitter
    Patent number: 7039825
    Abstract: In a receiving clock reproducing method, an estimated value of delay time fluctuation of a received signal is estimated at intervals defined by transmitting clock included in the received signal. To estimate the estimated value, an oscillator counter counts pulses of a reference clock supplied from an independent oscillator while a reading counter counts pulses of the receiving clock. The estimated value is used to control a voltage controlled oscillator for producing the receiving clock.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: May 2, 2006
    Assignee: NEC Corporation
    Inventors: Jun Furukawa, Yoshiaki Nozawa, Yasuhiro Arasawa
  • Clock reproducing method and receiving clock producing apparatus
    Publication number: 20030005348
    Abstract: In a receiving clock reproducing method, an estimated value of delay time fluctuation of a received signal is estimated at intervals defined by transmitting clock included in the received signal. To estimate the estimated value, an oscillator counter counts pulses of a reference clock supplied from an independent oscillator while a reading counter counts pulses of the receiving clock. The estimated value is used to control a voltage controlled oscillator for producing the receiving clock.
    Type: Application
    Filed: June 7, 2002
    Publication date: January 2, 2003
    Applicant: NEC CORPORATION
    Inventors: Jun Furukawa, Yoshiaki Nozawa, Yasuhiro Arasawa