Crystal oscillator-doubler

Posted on Jul 6, 2012

The crystal operates into a complex load at series resonance. Ll, Cl, and C2 balance the crystal at zero reactance. Capacitor Cl fine-tunes the center frequency

Crystal oscillator-doubler
Click here to download the full size of the above Circuit.

Tank circuit L2, C3 doubles the output frequency the circuit operates as an FM oscillator-doubler.

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