Patents by Inventor Yuh Chen

Yuh Chen 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 for controlling servo signal gains of an optical disc drive and method of the same
    Patent number: 8089834
    Abstract: The invention provides an apparatus for controlling servo signal gains of an optical disc drive. The apparatus adjusts the gains of a plurality of servo signals controlling a servo system of the optical disc drive when the optical disk drive encounters an operating state transition. In a first mode, at least one AGC loop of the apparatus compensates the gains of the servo signals with a selectable bandwidth during a specific period after the operating state transition to accelerate the convergence of the servo signals. In a second mode, at least one AGC loop of the apparatus reloads the previously saved convergence values or pre-determined values as the initial values according to the current operating state immediately after the operating state transition to accelerate the convergence of the servo signals.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: January 3, 2012
    Assignee: Mediatek Inc.
    Inventors: Chia-Wei Liao, Chih-Ching Chen, Yuh Chen, Ming-Jiou Yu, Kuo-Jung Lan, Chun-Yu Lin, Shu-Hung Chou