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14 - Phase-Locked Loops and Injection-Locked Oscillators

Published online by Cambridge University Press:  05 December 2024

Glenn Cowan
Glenn Cowan
Affiliation:
Concordia University, Montréal
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Summary

This chapter presents systems that use a voltage-controlled oscillator in a feedback loop to lock its phase to that of a reference clock. These systems, called phase-locked loops (PLLs), generate the signals used to clock decision circuits and MUX/DEMUX circuits. An introduction to PLLs and the notion of phase comparison starts this chapter. The typical Type II analog PLL is analyzed. Split tuning and details of frequency division are presented. Digital PLLs are now commonplace necessitating an overview. Injection-locked oscillators (ILOs) play an important role as clock buffers and multiphase generators This chapter gives an overview of ILO dynamics covering topics of jitter-tracking bandwidth, lock range and injection strength.

Keywords

Phase-locked loopXOR phase detectorphase detectorphase frequency detectorcharge pumploop filterstatic phase errorinjection-locked oscillatorjitter-tracking bandwidth
Type
Chapter
Information
Mixed-Signal CMOS for Wireline Communication
Transistor-Level and System-Level Design Considerations
 , pp. 333 - 365
Publisher: Cambridge University Press
Print publication year: 2024

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