Phase Frequency Detector Using Transmission Gates for High Speed Applications

In this paper a new phase-frequency detector is proposed using transmission gates which can detect phase difference less than 500ps. in other word, the proposed phase-frequency detector (pfd) can work in frequencies higher than 1.7 ghz, whereas a conventional pfd operates at frequencies less than 1.1 ghz. this new architecture is designed in tsmc 0.13um cmos technology. also, the proposed pfd achieves a capture range approximately twice that of conventional pfds. the simulation results support the theoretical predictions. to validate correct performance of this novel pfd, it is then used in a conventional delay locked loop structure.