Patents by Inventor Long-Ching Yeh

Long-Ching Yeh 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).

  • Silicon butting contact image sensor with two-phase shift register
    Patent number: 5299013
    Abstract: An improved contact image sensor (CIS) which uses a two-phase shift register is disclosed. The shift register is clocked by both phases of the clock signal, thereby doubling its speed. A transmission gate in the shift register is eliminated and combined with one of the inverters to allow two-phase operation and reduce the number of transistors required to implement the shift register.
    Type: Grant
    Filed: July 13, 1993
    Date of Patent: March 29, 1994
    Assignee: Dyna Image Corp.
    Inventors: Weng-Lyang Wang, Way-Chen Wu, Long-Ching Yeh