Patents by Inventor Chia Cheih Tunmu

Chia Cheih Tunmu 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).

  • Patent number: 7660538
    Abstract: An optical burst mode receiver comprises a photo-detector receiving an optical signal for conversion to a current signal, a transimpedance amplifier receiving and converting the current signal into first and second transmit signals, a limiting amplifier comprising first and second input terminals and an output terminal generating a data signal, and a control circuit coupled to the first and second transmit signals to verify that if the optical signal is valid. The control circuit is further coupled to the first and second input terminals of the limiting amplifier. When the optical signal is valid, the control circuit provides the first and second input terminals with the first and second transmit signals respectively to generate the data signal. When the optical signal is invalid, the control circuit provides the first and second input terminals with distinct voltage levels to maintain the data signal at a steady level.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: February 9, 2010
    Assignee: Industrial Technology Research Institute
    Inventors: Chia Cheih Tunmu, Steven S. W. Lee, Chu Hsun Chang, Po-Chun Chiang, Chih-Feng Cheng