SINGLE_OPAMP_

Published:2009/7/10 5:33:00 Author:May | From:SeekIC

When switch S1 is in talk position as shown, loudspeaker of master station acts as microphone, driving opamp through step-up transformer T1. Switch at remote station must then be in listen position. Supply voltage range is 8-20 V.- Audio Handbook, National Semiconductor, Santa Clara, CA, 1977, p 4-21-4-28.



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