MULTIPURPOSE_MINIAMPLIFIER

Published:2009/7/13 1:38:00 Author:May | From:SeekIC

This circuit uses two audio IC amplifiers, one for a preamp and one for a power output stage. Three audio inputs are provided-low (1 mV), medium (10 mV), and high (100 mV) input-to drive a pair of headphones or a strtall speaker. The LM386 is good for 0.5 W or more output, and a small speaker can be connected directly to the junction of C8 and R7. A series combination of a 22-Ω resistor and a 0.1-mF capacitor should be connected between this point and ground to suppress possible high-frequency oscillations in this case.



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