Improved the Noise Immunity of Phase-Locked Loop

  • Intachot, Terdsak (Control Engineer Department, Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut’s Institute of Technology Ladkrabang) ;
  • Panaudomsup, Sumit (Control Engineer Department, Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut’s Institute of Technology Ladkrabang) ;
  • Prempraneerach, Yothin (Control Engineer Department, Faculty of Engineering and Research Center for Communication and Information Technology King Mongkut’s Institute of Technology Ladkrabang)
  • Published : 2003.10.22

Abstract

This paper, we propose a new high noise immunity phase-locked loop(PLL) which can suppress the high incident noise coupling with large amplitude and long period to the input frequency of PLL and keeps constant frequency and phase of the VCO output for providing the high stability distribution clock pulse.

Keywords