Title :
Fractional rate phase detectors for clock and data recovery
Author :
Seedher, Ankit ; Sobelman, Gerald E.
Author_Institution :
Dept. of Electr. & Comput. Eng., Minnesota Univ., USA
Abstract :
Some recent PLL designs utilize a half-rate phase detector so that the VCO operates at a frequency that is one-half of the input data rate. In this paper, a technique is proposed to extend the half-rate phase detector structure to a rate of 1/2n, for integer n>1. The concept is explained using a rate 1/8 implementation and simulation results are presented to verify the scheme. These rate 1/2n phase detectors can be used to raise the maximum operating frequency of clock and data recovery circuits in a given CMOS process technology.
Keywords :
CMOS integrated circuits; circuit simulation; integrated circuit design; phase detectors; phase locked loops; synchronisation; voltage-controlled oscillators; CMOS technology; PLL; VCO frequency; clock/data recovery circuits; fractional rate phase detectors; half-rate phase detector; input data rate; CMOS process; CMOS technology; Circuits; Clocks; Latches; Optical fiber communication; Phase detection; Phase frequency detector; Phase locked loops; Voltage-controlled oscillators;
Conference_Titel :
SOC Conference, 2003. Proceedings. IEEE International [Systems-on-Chip]
Print_ISBN :
0-7803-8182-3
DOI :
10.1109/SOC.2003.1241533
