FREQUENCY_SHIFT_KEYED_OSCILLATOR

Published:2009/7/19 21:40:00 Author:Jessie | From:SeekIC

Q1 is Colpitts oscillator at 5 kc and Q2-Q3 is push-pull complementary-emitter amplifier with unity voltage gain. Either switch shorts amplifier, thereby increasing tuning capacitance enough to shift frequency 1 kc.-N. C. Hekimian, Getting Rid of Transients in Frequency-Shift Keying, Electronics, 35:45, p 58-59.



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