Patents by Inventor Nai-Chen Cheng

Nai-Chen Cheng 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).

  • Jitter measuring system and method
    Publication number: 20090088996
    Abstract: The present invention relates to a jitter measuring system, comprising: a delay circuit for receiving a clock signal and delaying the clock signal to generate a delay signal; a jitter amplifier for receiving the clock signal and delay signal to generate a first signal and a second signal; and a converter for converting a phase different between the first signal and the second signal into a relevant digital code; wherein the phase difference between the first signal and the second signal is an amplification of jitter.
    Type: Application
    Filed: September 19, 2008
    Publication date: April 2, 2009
    Applicant: Industrial Technology Research Institute
    Inventors: Yu Lee, Nai-Chen Cheng, Ji-Jan Chen