CAPACITIVELY_TUNED_WIEN

Published:2009/7/6 0:41:00 Author:May | From:SeekIC

Output of amplifier is connected to apex of Wien bridge. Positive feedback is taken from junction of C1A and C1B for noninverting input of first opamp, while negative feedback is taken from other junction of bridge for inverting input. Oscillation is sustained when R2 = 2r. Nonlinearity of lamp r provides stabilization of oscillator. Frequency depends on values used for bridge components.-H. D. Olson, Wien-Bridge Oscillator Is Capacitively Tuned, EDN Magazine, Aug. 5, 1975, p 74.



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