Patents by Inventor Peng-Zhan Zhang

Peng-Zhan Zhang 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).

  • Apparatus of impedance matching for output driver and method thereof
    Patent number: 7696775
    Abstract: An apparatus for impedance matching circuit is disclosed. The impedance matching apparatus has an output driver for outputting an output signal and includes an output data generator, for generating an output data signal; an output stage, for generating the output signal according to the output data signal, and receiving a first control signal to adjust an impendence of the output stage; an impendence unit, electrically coupled to the output stage, for receiving a second control signal to adjust an impedance of the impedance unit; and a calibration circuit electrically coupled to the output stage and the impedance unit, for outputting the first control signal and the second control signal to respectively control the output stage and the impedance unit such that a sum of impedances of the output stage and the impedance unit is adjusted to compensate an environment factor of the chip.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: April 13, 2010
    Assignee: Realtek Semiconductor Corp.
    Inventors: Liu Jian, Peng-Zhan Zhang
  • Method and circuit for producing spread spectrum and/or over clock signal
    Patent number: 7495496
    Abstract: The present invention is to provide a method and circuit for producing spread spectrum and over clock, which includes a primary circuit and a secondary circuit, wherein the primary circuit uses a frequency division technique based on phase swallow to achieve a high frequency resolution clock signal, and the secondary circuit multiplies the frequency of the output clock signal of the primary circuit, so as to expand its frequency range.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: February 24, 2009
    Assignee: Realtek Semiconductor Corp.
    Inventors: Peng-Zhan Zhang, Li-Jun Gu, Ran Ding
  • Apparatus of Impedance Matching for Output Driver and Method Thereof
    Publication number: 20070139123
    Abstract: An apparatus for impedance matching circuit is disclosed. The impedance matching apparatus has an output driver for outputting an output signal and includes an output data generator, for generating an output data signal; an output stage, for generating the output signal according to the output data signal, and receiving a first control signal to adjust an impendence of the output stage; an impendence unit, electrically coupled to the output stage, for receiving a second control signal to adjust an impedance of the impedance unit; and a calibration circuit electrically coupled to the output stage and the impedance unit, for outputting the first control signal and the second control signal to respectively control the output stage and the impedance unit such that a sum of impedances of the output stage and the impedance unit is adjusted to compensate an environment factor of the chip.
    Type: Application
    Filed: December 1, 2006
    Publication date: June 21, 2007
    Inventors: Jian Liu, Peng-Zhan Zhang
  • Method and circuit for producing spread spectrum and/or over clock signal
    Publication number: 20070001882
    Abstract: The present invention is to provide a method and circuit for producing spread spectrum and over clock, which includes a primary circuit and a secondary circuit, wherein the primary circuit uses a frequency division technique based on phase swallow to achieve a high frequency resolution clock signal, and the secondary circuit multiplies the frequency of the output clock signal of the primary circuit, so as to expand its frequency range.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 4, 2007
    Applicant: REALTEK SEMICONDUCTOR CORP.
    Inventors: Peng-Zhan Zhang, Li-Jun Gu, Ran Ding