Patents by Inventor Chang-Chia Hsiao

Chang-Chia Hsiao 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 and method for unity gain buffer with high switching speed and low quiescent current
    Patent number: 7646244
    Abstract: A unity gain buffer is provided. The unity gain buffer includes two complementary pairs of emitter followers and two bias current sources. The top bias current source is arranged to provide a bias current so that, if the input voltage is greater than zero, the bias current provided by the top current source increases at the input voltage increases. The bottom current source is arranged to provide a bias current so that, if the input voltage is less than zero, the bias current provided by the bottom current source decreases as the input voltage decreases.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: January 12, 2010
    Assignee: National Semiconductor Corporation
    Inventors: Chang Chia Hsiao, Dinh Nguyen
  • Integrated circuits with reduced switching noise
    Patent number: 5066873
    Abstract: A new slew rate controlled output buffer with built-in temperature and voltage compensation for integrated circuits is designed to reduce VCC/VSS switching noise encountered in high speed, high current drive integrated circuit applications.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: November 19, 1991
    Assignee: Altera Corporation
    Inventors: Yiu-Fai Chan, Chang-Chia Hsiao, James A. Watson