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What is Simple CMOS Phase Frequency Detector about?
This document describes a simple precharged CMOS phase frequency detector (PFD) circuit. The proposed PFD, called the ncPFD, uses 18 transistors and has a simple topology. It works up to clock frequencies of 800 MHz according to simulations. Unlike some other PFD circuits, the ncPFD has no dead zone in its phase characteristic, which is important for low jitter applications. The document presents the phase and frequency characteristics of the ncPFD and compares it to other PFD circuits. It also discusses si
- Author
- mohan sardar
- Language
- EN