Construction of an audio amplifier circuit using LM386 amplifier

Abstract

An audio power amplifier is used to amplifier low-power audio signals to a level that can be suitable for driving the loudspeakers. Thus the audio power amplifier becomes a kind of essential part in the electronics that could make sounds. The measured results show a good output waveform, the output power 256mW, the maximum voltage gain 40. Meanwhile, sound can be heard by ear clearly. Judging from the results, the audio power amplifier is designed successfully.