Patents by Inventor Yong K. Yim

Yong K. Yim 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).

  • INTEGRATED CIRCUIT HAVING A DUMMY TRANSIMPEDANCE AMPLIFIER
    Publication number: 20110148522
    Abstract: Consistent with the present disclosure, a “dummy” transimpedance amplifier (dummy TIA) is provided on a substrate along with one or more other transimpedance amplifiers (TIAs) that are connected to photodiodes and output voltage signals for further processing. Typically, the dummy TIA is not connected to a photodiode and does not supply a useful output. The dummy TIA, however, is subject to the same processing and temperature variations as the other TIAs, and, as a result, the voltage on the dummy TIA inverting input will be the same or substantially the same as that of the other TIAs. Thus, by sensing the dummy TIA inverting input voltage, an appropriate photodiode bias can be obtained without direct measurement of the voltage on the inverting inputs of the other TIAs.
    Type: Application
    Filed: December 23, 2009
    Publication date: June 23, 2011
    Inventors: Huan-Shang Tsai, Yong K. Yim
  • Integrated circuit having a dummy transimpedance amplifier
    Patent number: 7961053
    Abstract: Consistent with the present disclosure, a “dummy” transimpedance amplifier (dummy TIA) is provided on a substrate along with one or more other transimpedance amplifiers (TIAs) that are connected to photodiodes and output voltage signals for further processing. Typically, the dummy TIA is not connected to a photodiode and does not supply a useful output. The dummy TIA, however, is subject to the same processing and temperature variations as the other TIAs, and, as a result, the voltage on the dummy TIA inverting input will be the same or substantially the same as that of the other TIAs. Thus, by sensing the dummy TIA inverting input voltage, an appropriate photodiode bias can be obtained without direct measurement of the voltage on the inverting inputs of the other TIAs.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: June 14, 2011
    Assignee: Infinera Corporation
    Inventors: Huan-Shang Tsai, Yong K. Yim