Patents Represented by Attorney Robert P. Sabath & Truong Sabath
  • Patent number: 5949264
    Abstract: A digital phase detector and charge pump circuit system reset circuit and method resets a digital phase detector according to the charge outputs between the charge pump circuits and a following loop filter. The sensing circuitry emulates portions of the circuitry of the digital phase detector and charge pump circuit system and minimizes deadband time. Current mirror portions of the charge pump circuit alternate between p-channel and n-channel devices to regularize output voltage levels produced by the charge pump circuit system.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: September 7, 1999
    Inventor: Dennis C. Lo