Patents by Inventor Ying-Min Liao

Ying-Min Liao 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).

  • Reference buffer circuits for providing reference voltages
    Patent number: 7956597
    Abstract: A reference buffer circuit provides a reference voltage at an output node and comprises a closed-loop branch comprising an amplifier and first and second MOS transistors and an open-loop branch comprising a third MOS transistor. A positive input terminal of the amplifier receives an input voltage. A gate of the first MOS transistor is coupled to the output terminal of the amplifier, and a source is coupled to a negative input terminal of the amplifier. A gate of the second MOS transistor is coupled to the drain of the first MOS transistor, a source is coupled to a first voltage source, and a drain is coupled to the source of the first MOS transistor. A gate of the third MOS transistor is coupled to the output terminal of the amplifier, and a source is coupled to the output node.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: June 7, 2011
    Assignee: MediaTek Inc.
    Inventors: Ying-Min Liao, Yu-Hsin Lin
  • REFERENCE BUFFER CIRCUITS
    Publication number: 20090315531
    Abstract: A reference buffer circuit provides a reference voltage at an output node and comprises a closed-loop branch comprising an amplifier and first and second MOS transistors and an open-loop branch comprising a third MOS transistor. A positive input terminal of the amplifier receives an input voltage. A gate of the first MOS transistor is coupled to the output terminal of the amplifier, and a source is coupled to a negative input terminal of the amplifier. A gate of the second MOS transistor is coupled to the drain of the first MOS transistor, a source is coupled to a first voltage source, and a drain is coupled to the source of the first MOS transistor. A gate of the third MOS transistor is coupled to the output terminal of the amplifier, and a source is coupled to the output node.
    Type: Application
    Filed: June 24, 2008
    Publication date: December 24, 2009
    Applicant: MEDIATEK INC.
    Inventors: Ying-Min LIAO, Yu-Hsin LIN