Sinusoidal_VCO

Published:2009/7/17 3:23:00 Author:Jessie | From:SeekIC

This circuit amplifiers configured as uses two XR-13600 OTAs (Fig.11-1B) , with three of the amplifiers configured as low-pass filters and the fourth as a limiter/inverter. The circuit oscillates at the frequency, where the loop phase-shift is 360° or 180°for the inverter and 60° per filter stage. This VCO operates from 5 Hz to 50 kHz with less than 1 % THD. EXAR corporation Databook, 1990 p 5-255



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