20_20000_Hz

Published:2009/7/5 22:42:00 Author:May | From:SeekIC

Wide-range audio oscillator covers AF spectrum in three switch-selected ranges, with harmonic distortion as low as 0.15%, for quick checks of audio equipment. Drain is only 6 mA from two 9-V batteries. Circuit is Wien-bridge oscillator using 741 opamp. Article covers construction and calibration, including optional connection for operation from single 9-V battery with AF output reduced to 2 V.-J. J. Schultz, Wide Range IC Audio Oscillator, 73 Magazine, Jan. 1974, p 25-28.



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