Patents by Inventor Gin-Yuan Sheh

Gin-Yuan Sheh 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).

  • Patent number: 6816348
    Abstract: An input protection circuit is provided for protecting internal circuitry of a handheld electric device. The internal circuitry has a positive input node and a ground node. The input protection circuit includes a power socket having a positive input node and a ground node, a bipolar junction transistor (BJT), a metal-oxide semiconductor (MOS) transistor for controlling the on and off states of the BJT, and an overvoltage protective circuit. An emitter of the BJT is electrically connected to the positive input node of the power socket, and a collector is electrically connected to the positive input node of the internal circuitry. When a reverse DC voltage or a DC voltage exceeding a threshold inputs from the power socket, the overvoltage protective circuit will turn off the MOS transistor, thereby turning off the BJT to prevent damages of the internal circuitry.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: November 9, 2004
    Assignee: Compal Electronics, Inc.
    Inventors: Chung-Ho Chen, Chien-Hao Huang, Gin-Yuan Sheh
  • Publication number: 20020171298
    Abstract: An input protection circuit is provided for protecting internal circuitry of a handheld electric device. The internal circuitry has a positive input node and a ground node. The input protection circuit includes a power socket having a positive input node and a ground node, a bipolar junction transistor (BJT), a metal-oxide semiconductor (MOS) transistor for controlling the on and off states of the BJT, and an overvoltage protective circuit. An emitter of the BJT is electrically connected to the positive input node of the power socket, and a collector is electrically connected to the positive input node of the internal circuitry.
    Type: Application
    Filed: January 29, 2002
    Publication date: November 21, 2002
    Inventors: Chung-Ho Chen, Chien-Hao Huang, Gin-Yuan Sheh