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Demystifying the PLL |
 As
RF and microwave engineers we use a lot of frequency sources that are
synchronized to reference oscillators. Doing so requires some form of
phase-locked loop circuitry. Feedback and control circuits classes in
college taught the basics that are simple enough to understand, but
unless you happen to have designed a PLL circuit during your career
- we more often buy packaged devices or modules that someone else designed
- chances are the concept has become a bit fuzzy by now. This brief
article in EDN runs over the basics of
PLL operation.
Posted April 2013 |
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