Patents by Inventor Tai C. Shyu

Tai C. Shyu 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).

  • CMOS N-well bias generator and gating system
    Patent number: 4670861
    Abstract: A system for preventing forward biasing of the bit line junctions formed between the N-well and bit lines of a CMOS memory. The system includes a gating system for maintaining the bit line voltage at V.sub.CC /2 whenever the well voltage is less than V.sub.CC. A well regulator and well pump maintain the well voltage at a selected multiple of V.sub.CC.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: June 2, 1987
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Lee-Lean Shu, Chao-Ven Kao, Tai C. Shyu
  • Low power CMOS reference generator with low impedance driver
    Patent number: 4634894
    Abstract: A low power, low output impedance, CMOS voltage reference with high source/sink current driving capability. A CMOS current mirror preamplifier includes matched transistor pairs having their W/L ratios scaled to reduce the level of current to the subthreshold region. A CMOS source follower output stage also has its transistors biased in the subthreshold region. Circuitry for protecting the preamplifier from the effects of supply voltage and output voltage bumps is also disclosed.
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: January 6, 1987
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Lee-Lean Shu, Tai C. Shyu, Patrick T. Chuang