2_kHz_TWO_PHASE

Published:2009/7/6 7:56:00 Author:May | From:SeekIC

Dual opamp circuit uses two-pole Butterworth bandpass filter followed by phase-shifting single-pole stage that is fed back through zener voltage limiter. Circuit pro-vides simultaneous sine and cosine outputs. Distortion is about 1.5% for sine output and about 3% for cosine. Component values shown are for 741 opamp. For higher frequencies, use 531 opamps to reduce distortion due to slew limiting.- Signetics Analog Data Manual, Signetics, Sunnyvale, CA, 1977, p 642-644.



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