SELF_GENERATING_FSK

Published:2009/7/15 2:03:00 Author:Jessie | From:SeekIC

Dual oscillators in Motorola MC1545G gated video amplifier are used with external frequency-determining components R1C1 and R2C2 to give 1.6 kHz for fl and 1.35 kHz for f1. Logic switching network compares output to reference and updates gate input with each cycle of output. Circuit gives smaller switching transients than are possible with separate oscillators because one oscillator is driven at frequency of the other while first oscillator is of. R3 sets transition to any level desired.- Gated Video Amplifier Applications-the MC1545, Motorola, Phoenix, AZ, 1976, AN-491, p 13.



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