Burkhard Kainka
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Electronics for Starters (8)

Part 8: Audio Preamplifier

Electronics for Starters (8)
The principle of a (preferably) linear amplifier is straightforward: an audio signal modulates (varies in volume and frequency) the small base current of a transistor, so that the amplified collector current produces corresponding audio signals of greater intensity. The most commonly employed amplifier circuit is the emitter circuit, the name implying that the emitter is connected to the common ground potential of the circuit.
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