Patents by Inventor Jiann-Jeng (John) Duh

Jiann-Jeng (John) Duh 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).

  • Synchronous address and data multiplexed mode for SRAM
    Patent number: 7710789
    Abstract: A synchronous memory system configurable in a multiplexed or non-multiplexed mode. In the multiplexed mode, address and data are provided on a shared bus, and accesses to the memory system are qualified by memory access control signals, including an address strobe signal, a counter enable signal and a counter repeat signal. A read/write control signal is maintained for one cycle after the last valid access command to avoid bus turn-around problems. In the multiplexed mode, chip enable and output enable signals may be constantly activated, thereby simplifying associated printed circuit board design. Different ports of the synchronous memory system can be independently configured to operate in either the multiplexed or non-multiplexed mode.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: May 4, 2010
    Assignee: Integrated Device Technology, inc.
    Inventors: Tzong-Kwang (Henry) Yeh, Jiann-Jeng (John) Duh, Casey Springer
  • Synchronous Address And Data Multiplexed Mode For SRAM
    Publication number: 20090089538
    Abstract: A synchronous memory system configurable in a multiplexed or non-multiplexed mode. In the multiplexed mode, address and data are provided on a shared bus, and accesses to the memory system are qualified by memory access control signals, including an address strobe signal, a counter enable signal and a counter repeat signal. A read/write control signal is maintained for one cycle after the last valid access command to avoid bus turn-around problems. In the multiplexed mode, chip enable and output enable signals may be constantly activated, thereby simplifying associated printed circuit board design. Different ports of the synchronous memory system can be independently configured to operate in either the multiplexed or non-multiplexed mode.
    Type: Application
    Filed: September 27, 2007
    Publication date: April 2, 2009
    Applicant: Integrated Device Technology, Inc.
    Inventors: Tzong-Kwang (Henry) YEH, Jiann-Jeng (John) DUH, Casey SPRINGER