Standard designs of Phase Frequency Detector

In this article, a summary of the literature survey regarding the Phase Frequency Detector is presented, along with the discussion of blind zone as well as dead zone problems. A brief introduction to the PLL architecture along with the traditional design of PFD is provided. The differences between Phase Detection and Phase Frequency Detection are indicated. Later on, the techniques that are utilized to reduce the blind zone and dead zone within the PFD are investigated, and the relevant tradeoffs are pointed out. The findings are summarized, and the latest PFD designs are compared. The article concludes with the comparison of relevant PLL architectures that comprise of various PFD designs.