Patents by Inventor Ryusuke Shibata

Ryusuke Shibata 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).

  • Light receiving circuit
    Patent number: 7714269
    Abstract: A light receiving circuit according to the present invention includes a current control voltage generation circuit 10 outputting control voltages Vcont1 and Vcont2, a first current adjusting circuit 11 generating a first output current Io1 by regulating a first input current Ii1 depending on a voltage difference of the control voltages Vcont1 and Vcont2, the first input current Ii1 generated by adding a first reference current Ia1 and an input current Ipd, a second current adjusting circuit 12 generating a second output current Io2 by regulating a second reference current Ia2 depending on the voltage difference of the control voltages Vcont1 and Vcont2, and a current voltage conversion circuit 13 generating a first output voltage Vo1 by converting the first output current Io1 to voltage based on a first resistance Rf1 and generating a second output voltage Vo2 by converting the second output current Io2 to voltage based on a second resistance Rf2.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: May 11, 2010
    Assignee: NEC Electronics Corporation
    Inventors: Kei Yoshikawa, Ryusuke Shibata, Tokio Sawataishi, Nobuo Nagano, Koichi Iguchi
  • Light receiving circuit
    Publication number: 20080197890
    Abstract: A light receiving circuit according to the present invention includes a current control voltage generation circuit 10 outputting control voltages Vcont1 and Vcont2, a first current adjusting circuit 11 generating a first output current Io1 by regulating a first input current Ii1 depending on a voltage difference of the control voltages Vcont1 and Vcont2, the first input current Ii1 generated by adding a first reference current Ia1 and an input current Ipd, a second current adjusting circuit 12 generating a second output current Io2 by regulating a second reference current Ia2 depending on the voltage difference of the control voltages Vcont1 and Vcont2, and a current voltage conversion circuit 13 generating a first output voltage Vo1 by converting the first output current Io1 to voltage based on a first resistance Rf1 and generating a second output voltage Vo2 by converting the second output current Io2 to voltage based on a second resistance Rf2.
    Type: Application
    Filed: February 1, 2008
    Publication date: August 21, 2008
    Applicant: NEC ELECTRONICS CORPORATION
    Inventors: Kei Yoshikawa, Ryusuke Shibata, Tokio Sawataishi, Nobuo Nagano, Koichi Iguchi