AF_LEVEL_CONTROL

Published:2009/6/29 23:47:00 Author:May | From:SeekIC

AD533J analog multiplier used in its divide mode provides measure of automatic level control to compensate for variations in loudness occurring from micro-phone to microphone in publicaddress system.Divider output is first rectified and compared with -15 V reference, Difference is then integrated and fed into denominator of divider-connected AD533J as control signal Vx. Average AC output is held within 1% of 7 V.-R. Frantz, An-alog Multipliers-New IC Versions Manipulate Real-World Phenomena with Ease, EDN Magazine, Sept. 5, 1977, p 125-129.



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