COMPANDER_WITH_100dB_RANGE

Published:2009/6/29 22:46:00 Author:May | From:SeekIC

Simple squarelaw circuit preserves dynamic range of virtually any input signal when recorded by or dinary tape recorder. Suitable for speech signals as well as for recording or playback in noisy environments. Opamp A1 should have separately decoupled supply. Switching provides compression during recording and expansion during playback. Tracking of photocells is essential for accurate power-law compansion, LED can be glued with clear epoxy to matched photocells. Use silicon signal diodes such as 1N914, 1N4148, or 1S44. Inexpensive photocells such as Vactec VT-833 gave suitably low distortion. Article gives performance characteris-tics and operating details.-J. Vanderkooy, Wideband Compander Design, Wireless World, July 1976, p 45-49.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Amplifier_Circuit/COMPANDER_WITH_100dB_RANGE.html

Print this Page | Comments | Reading(3)