Patents by Inventor Yih-Chyi Chong

Yih-Chyi Chong 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: 8339197
    Abstract: Matched bipolar transistor pairs for use in differential transistor pair circuitry, current mirror transistor pair circuitry and voltage reference transistor pair circuitry are disclosed. Each transistor in the pair includes a base, emitter and a collector region and a doped polysilicon emitter contact, a metal emitter contact and an metal emitter interconnect which makes an electrical connection to the emitter region by way of the metal emitter contact and the polysilicon emitter contact. The metal emitter interconnect is displaced latterly away from the emitter region so that no part of the metal emitter interconnect overlies any portion of the emitter region.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: December 25, 2012
    Assignee: National Semiconductor Corporation
    Inventors: Kwok-Fu Chiu, Yih-Chyi Chong, Michael E. Haslam
  • Publication number: 20120139634
    Abstract: Matched bipolar transistor pairs for use in differential transistor pair circuitry, current mirror transistor pair circuitry and voltage reference transistor pair circuitry are disclosed. Each transistor in the pair includes a base, emitter and a collector region and a doped polysilicon emitter contact, a metal emitter contact and an metal emitter interconnect which makes an electrical connection to the emitter region by way of the metal emitter contact and the polysilicon emitter contact. The metal emitter interconnect is displaced latterly away from the emitter region so that no part of the metal emitter interconnect overlies any portion of the emitter region.
    Type: Application
    Filed: December 2, 2010
    Publication date: June 7, 2012
    Inventors: Kwok-Fu Chiu, Yih-Chyi Chong, Michael E. Haslam