
T
here’s one last IC we’re going to discuss in this book, and it’s a doozy. We’ve
saved it for last, both to keep you in a state of unmitigated suspense and
because it’s by far the most complicated.
The IC du jour is the CD4046, known to her buddies as a phase-locked loop.
This chip was developed for a variety of nifty mid-twentieth-century applications,
including walkie-talkies, touch-tone phones, and all sorts of dangerous-looking
radio equipment. A phase-locked loop works with two signals, and nudges ...