Patents by Inventor Feng D. Lin

Feng D. Lin 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).

  • Duty cycle distortion compensation for the data output of a memory device
    Patent number: 7206956
    Abstract: A technique for compensating for duty cycle distortion in an output data signal generated by a synchronous dynamic random access memory device (SDRAM) is provided. The output latch of the SDRAM is driven by an output clock signal generated by a delay lock loop (DLL). The output clock signal is phase-shifted relative to a reference clock signal received by the DLL such that the data removed from the output latch is synchronous with the reference clock signal. Further the duty cycle of the output clock signal is adjusted in a phase inverse relationship to the duty cycle distortion introduced by the output latch. As a result, the output data signal has reduced duty cycle distortion.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: April 17, 2007
    Assignee: Micron Technology, Inc.
    Inventors: James B. Johnson, Feng D. Lin
  • Duty cycle distortion compensation for the data output of a memory device
    Patent number: 7028208
    Abstract: A technique for compensating for duty cycle distortion in an output data signal generated by a synchronous dynamic random access memory device (SDRAM) is provided. The output latch of the SDRAM is driven by an output clock signal generated by a delay lock loop (DLL). The output clock signal is phase-shifted relative to a reference clock signal received by the DLL such that the data removed from the output latch is synchronous with the reference clock signal. Further the duty cycle of the output clock signal is adjusted in a phase inverse relationship to the duty cycle distortion introduced by the output latch. As a result, the output data signal has reduced duty cycle distortion.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: April 11, 2006
    Assignee: Micron Technology, Inc.
    Inventors: James B. Johnson, Feng D. Lin
  • Method and apparatus for compensating duty cycle distortion in a data output signal from a memory device by delaying and distorting a reference clock
    Patent number: 6895522
    Abstract: A technique for compensating for duty cycle distortion in an output data signal generated by a synchronous dynamic random access memory device (SDRAM) is provided. The output latch of the SDRAM is driven by an output clock signal generated by a delay lock loop (DLL). The output clock signal is phase-shifted relative to a reference clock signal received by the DLL such that the data removed from the output latch is synchronous with the reference clock signal. Further the duty cycle of the output clock signal is adjusted in a phase inverse relationship to the duty cycle distortion introduced by the output latch. As a result, the output data signal has reduced duty cycle distortion.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: May 17, 2005
    Assignee: Micron Technology, Inc.
    Inventors: James B. Johnson, Feng D. Lin
  • Duty cycle distortion compensation for the data output of a memory device
    Publication number: 20020133731
    Abstract: A technique for compensating for duty cycle distortion in an output data signal generated by a synchronous dynamic random access memory device (SDRAM) is provided. The output latch of the SDRAM is driven by an output clock signal generated by a delay lock loop (DLL). The output clock signal is phase-shifted relative to a reference clock signal received by the DLL such that the data removed from the output latch is synchronous with the reference clock signal. Further the duty cycle of the output clock signal is adjusted in a phase inverse relationship to the duty cycle distortion introduced by the output latch. As a result, the output data signal has reduced duty cycle distortion.
    Type: Application
    Filed: March 15, 2001
    Publication date: September 19, 2002
    Inventors: James B. Johnson, Feng D. Lin