ALTPLL (Phase-Locked Loop) IP Core User Guide

ID 683732
Date 6/16/2017
Document Table of Contents

Phase-Locked Loop

The Phase-Locked Loop (PLL) is a closed-loop frequency-control system that compares the phase difference between the input signal and the output signal of a voltage-controlled oscillator (VCO). The negative feedback loop of the system forces the PLL to be phase-locked.

PLLs are widely used in telecommunications, computers, and other electronic applications. You can use the PLL to generate stable frequencies, recover signals from a noisy communication channel, or distribute clock signals throughout your design.