Posted on Saturday, May 7th, 2011 in app notes by Ian
rsdio writes: nothing beats a pure sine wave oscillator, except another pure sine wave oscillator at a similar frequency:
This circuit derives a pure sinewave from a crystal-controlled clock source by using a ring counter to remove the highest-amplitude unwanted harmonics, and filtering the result with an 8th-order lowpass, switched-capacitor elliptic filter (MAX7400).
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