Patents by Inventor Johnny Chung-Lee Chen

Johnny Chung-Lee Chen 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).

  • OTP sector double protection for a simultaneous operation flash memory
    Patent number: 6662262
    Abstract: A simultaneous operation flash memory capable of providing double protection to An OTP sector. The preferred simultaneous operation flash memory comprises an OTP write-protect CAM, which is in a programmed state if the OTP sector is write-protected. In addition, the preferred simultaneous flash memory further includes an OTP sector lock CAM that is electrically connected with the OTP write-protect CAM. The OTP sector lock CAM is used to lock the OTP write-protect CAM in the programmed state, which, in turn, will designate the OTP sector as read only.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: December 9, 2003
    Assignees: Advanced Micro Devices, Inc., Fujitsu Limited
    Inventors: Yasushi Kasa, Johnny Chung-Lee Chen, Guowei Wang, Tiao-Hua Kuo
  • Separate output power supply to reduce output noise for a simultaneous operation
    Patent number: 6178129
    Abstract: A flash memory device (100) provides for simultaneous read and write operations in two banks (194, 196) of flash memory cells. A plurality of output circuits (182) switch large amounts of current during reading of stored data. To reduce noise in read circuitry (174) and write circuitry (142), a separate power supply bus (204) and ground bus (208) is provided for the output circuits. The power supply bus is independent of the power supply bus which serves the internal circuitry, such as the read circuitry and the write circuitry.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: January 23, 2001
    Assignee: Advanced Micro Devices, Inc.
    Inventor: Johnny Chung-Lee Chen