1O_2O_MHz_CRYSTAL

Published:2009/7/2 7:11:00 Author:May | From:SeekIC

Modification of basic Colpitts crystal oscillator has excellent load capacitance correlationand temperature stability. Crystal will oscillate very close to its series resonant point. Component values are optimized for 10-20 MHz. Emitter-follower Q2 provides power gain for feedback energy and gives high crystal activity without changing phase angle of signal. Output buffer Q3 prevents loading of oscillator. Q1 is low-cost Motorola JFET, but practically any other JFET will work CR1 is 1N914 or 1N4148.-D. L. Stoner, High-Stability Crystal Oscillator, Ham Radio, Oct. 1974, p 36-39.



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