OPAMP_DRIVES_POWER_DARLINGTONS

Published:2009/7/21 1:26:00 Author:Jessie | From:SeekIC

Differential outputs for Darlingtons are obtained by using power supply pins of 741 opamp. Tr1 and Tr2 can be any general-purpose transistors, and individual transistors can replace Darling-ton pairs. If circuit is used in servo system, add components shown in broken lines for zeroing of output offset. With values shown, 30 W can be delivered into 8 ohms from DC to 100 kHz at gain of 10 with less than 0.2% distortion.-K. Griffiths, Novel Power Amplifier, Wireless World, Dec. 1974, p 504.



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