Crystal Oscillator

337

07:37:11

Square wave oscillator controlled by a fixed frequency crystal. The poof caps and coil in the bottom right represent a rough equivalent of a crystal.

Uses LM139 Comparator, copied from the Texas instruments datasheet. 

published 12 years ago

DL3BUS

12 years ago

There is no oscillation shown. Whats wrong?

MattBech

12 years ago

You need to shake the phone to inject noise to start the oscillation

hurz

12 years ago

Its oscillating, but it seems to me it does just as RC oscillator.

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