Minimum_component_audio_amplifier

Published:2009/7/23 21:21:00 Author:Jessie | From:SeekIC

Because the LM380 has internal biasing and compensation, this basic audio amplifier requires only an output-coupling capacitor (typically 500μF). Of course, such an amplifier has no tone- or volume-control (Figs. 1-33 through 1-36).The circuit can supply about 2.5 W into an 8-Ω speaker, with a VS of 12V or greater. The RC and CC components suppress 5- to 10-MHz oscillation that can occur during the negative swing into a high-current load. Although such oscillation will not pass through the speaker, the radiated signals can produce interference in RF-sensitive equipment.



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