Patents by Inventor Gary Shyi

Gary Shyi 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).

  • Forward power converter with self-excited synchronous rectifying circuit
    Patent number: 6995988
    Abstract: A forward power converter with a self-excited synchronous rectifying circuit makes use of the self-excitation function of a transformer to generate electric energy at a secondary side winding coil of the transformer, hence controlling an n-channel FET to accomplish synchronous rectification. In the synchronous rectifying circuit, the drain of the n-channel FET is connected to an end of the secondary side of a first transformer, the source of the n-channel FET is connected to a positive end of a flywheel diode, the negative end of the flywheel diode is connected to the other end of the secondary side of the first transformer, a control end of the n-channel FET is connected to an end of an induction coil via a resistor and a capacitor, and the other end of the induction coil is connected to the source of the n-channel FET.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: February 7, 2006
    Assignee: Li Shin International Enterprise Corporation
    Inventor: Gary Shyi
  • Forward power converter with self-excited synchronous rectifying circuit
    Publication number: 20040196673
    Abstract: A forward power converter with a self-excited synchronous rectifying circuit makes use of the self-excitation function of a transformer to generate electric energy at a secondary side winding coil of the transformer, hence controlling an n-channel FET to accomplish synchronous rectification. In the synchronous rectifying circuit, the drain of the n-channel FET is connected to an end of the secondary side of a first transformer, the source of the n-channel FET is connected to a positive end of a flywheel diode, the negative end of the flywheel diode is connected to the other end of the secondary side of the first transformer, a control end of the n-channel FET is connected to an end of an induction coil via a resistor and a capacitor, and the other end of the induction coil is connected to the source of the n-channel FET.
    Type: Application
    Filed: April 23, 2004
    Publication date: October 7, 2004
    Applicant: Li Shin International Enterprise Corporation
    Inventor: Gary Shyi