Patents by Inventor Shao-Ku Kao

Shao-Ku Kao 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).

  • Spread spectrum clock generator with low jitter
    Patent number: 7639053
    Abstract: A spread spectrum clock generator includes: a phase frequency detector, for generating a phase difference signal according to a frequency divided signal and a reference signal with a reference frequency; a charge pump, for receiving the phase difference signal and generating an output current according to the phase difference signal; a loop filter, for receiving the output current and converting the output current to a voltage-controlled signal; a voltage-controlled oscillator, for receiving the voltage-controlled signal and generating a plurality of voltage-controlled output signals, wherein the plurality of voltage-controlled signals have a specific phase difference and a same voltage-controlled frequency; a frequency dividing unit, for receiving the plurality of voltage-controlled output signal and generating the frequency divided signal; and a delta-sigma modulator, for controlling the frequency dividing unit to have an equivalent divided value of (N+b)S+(N?a)(P?S) through receiving the frequency divided
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: December 29, 2009
    Assignee: Faraday Technology Corporation
    Inventors: Ding-Shiuan Shen, Shao-Ku Kao, Shen-Iuan Liu, Chia-Liang Lai
  • SPREAD SPECTRUM CLOCK GENERATOR WITH LOW JITTER
    Publication number: 20080303566
    Abstract: A spread spectrum clock generator includes: a phase frequency detector, for generating a phase difference signal according to a frequency divided signal and a reference signal with a reference frequency; a charge pump, for receiving the phase difference signal and generating an output current according to the phase difference signal; a loop filter, for receiving the output current and converting the output current to a voltage-controlled signal; a voltage-controlled oscillator, for receiving the voltage-controlled signal and generating a plurality of voltage-controlled output signals, wherein the plurality of voltage-controlled signals have a specific phase difference and a same voltage-controlled frequency; a frequency dividing unit, for receiving the plurality of voltage-controlled output signal and generating the frequency divided signal; and a delta-sigma modulator, for controlling the frequency dividing unit to have an equivalent divided value of (N+b)S+(N?a)(P?S) through receiving the frequency divided
    Type: Application
    Filed: June 6, 2008
    Publication date: December 11, 2008
    Applicant: FARADAY TECHNOLOGY CORPORATION
    Inventors: Ding-Shiuan Shen, Shao-Ku Kao, Shen-Iuan Liu, Chia-Liang Lai