An SEU/SET-Tolerant Phase Frequency Detector With Double-Loop Self-Sampling Technology for Clock Data Recovery

Abstract

A hardened phase frequency detector (PFD) employing double-loop self-sampling technology is proposed for clock and data recovery. The PFD can remove the error state and maintain the correct state by the use of the sampler. The laser experiment shows that the threshold value of the proposed PFD has been greatly improved.