Patents by Inventor Shih-Chien Wu

Shih-Chien Wu 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).

  • Pop noise suppression apparatus and audio output system utilizing the same
    Patent number: 8199930
    Abstract: A pop noise suppression apparatus for eliminating popping noise generated upon initiation or shutdown of an audio output circuit comprises a switch component and a control circuit. The switch component allows the audio output circuit to provide audio through the output of the audio output circuit. The control circuit provides a mute signal for a first period of time in to response initiation or shutdown of the audio circuit. The control circuit comprises a capacitor to be charged upon initiation of the audio output circuit or to be discharged upon shutdown of the audio output circuit. A length of the first period of time during which the mute signal is provided depends on a second period of time to charge or discharge the capacitor.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: June 12, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shih-Chien Wu
  • POP NOISE SUPPRESSION APPARATUS AND AUDIO OUTPUT SYSTEM UTILIZING THE SAME
    Publication number: 20090208032
    Abstract: A pop noise suppression apparatus for eliminating popping noise generated upon initiation or shutdown of an audio output circuit comprises a switch component and a control circuit. The switch component allows the audio output circuit to provide audio through the output of the audio output circuit. The control circuit provides a mute signal for a first period of time in to response initiation or shutdown of the audio circuit. The control circuit comprises a capacitor to be charged upon initiation of the audio output circuit or to be discharged upon shutdown of the audio output circuit. A length of the first period of time during which the mute signal is provided depends on a second period of time to charge or discharge the capacitor.
    Type: Application
    Filed: December 29, 2008
    Publication date: August 20, 2009
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: SHIH-CHIEN WU