This a short paper discussing three implementations of digital loop filters for phase-locked loops (PLLs)

implemented either in digital circuitry or in software. This paper is by no means intended to be a

comprehensive theoretical discussion of the topic, but rather a quick reference for the engineering student or

practicing engineer. If you need a theoretical background in the subject of PLLs, please see the

bibliography at the end of this monograph.-This is a short paper discussing three implementations of digital loop filters for phase-locked loops (PLLs)

implemented either in digital circuitry or in software. This paper is by no means intended to be a

comprehensive theoretical discussion of the topic, but rather a quick reference for the engineering student or

practicing engineer. If you need a theoretical background in the subject of PLLs, please see the

bibliography at the end of this monograph.