Patents Represented by Attorney, Agent or Law Firm Robert P. Frank
  • Patent number: 6297680
    Abstract: An internal clock generation circuit according to the present invention includes a phase comparator, a shift register, a filter, a monitor circuit, and a plurality of delay lines such as first and second delay lines. The first delay line has delay steps each larger than that of the second delay line. The first delay line is first used to generate a clock minimized in phase difference with respect to an external clock. The clock signal is inputted to the second delay line to perform fine adjustment to the phase difference.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: October 2, 2001
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Takako Kondo