![]() This needs to reduce cross-over distortion which occurs whenever two transistors are connected in push-pull. There is a voltage differential of 0.6V between their base and emitter leads. Recommended: 3 transistor audio amplifier circuit The emitter voltage of 0.6V less than this, and will be 4.9V.Īnd next, The Q2-transistor is biased so that it provides a voltage across the 270 ohms load resistor, which will give the output transistors. ![]() This provides the base with a bias voltage of 5.5V. Then, at Q1 the bias of the whole circuit commences with the voltage divider made up of the 56K and 100K resistors. Next, the Q1 and Q2 transistors run as a pre-amp to increase the incoming voltage to drive the output pair. Each output transistor deals with one half of the audio cycle, one being cut-off when the other conduct. GET UPDATE VIA EMAIL 4 transistors workingīoth transistors Q3 and Q4 are arranged as a complementary pair operating in push-pull.
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