WIEN_SINE_WAVE

Published:2009/7/5 23:53:00 Author:May | From:SeekIC

Uses NE571 analog compandor in oscillator circuit based on Wien network formed by R1-C1 and R2-C2, placed around output amplifier of section A to make it bandpass amplifier. Section B serves as inverting amplifier with nominal gain of 2. Total harmonic distortion is below 0.1%. Operating frequency is about 1.6 kHz for values shown, but can be varied from 10 Hz to 10 kHz. Frequency is l/21πRCforR = R1 = R2 and C = Cl = C2. R should be kept between 10K and 1 megohm and C between 1000 pF and 1 μF. Useful as fixed-frequency oscillator but can be tuned if matched dual pot is used for R1.R2.-W. G. Jung, Gain Control IC for Audio Signal Processing. Ham Radio, July 1977, p 47-S3.



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