Amplifier circuit with complementary push=pull stage - produces high gain at very low supply voltage and has connectors of output stage transistors connected together

摘要

The amplifier has a complementary pushpull stage that requires a very low supply voltage to achieve high gain. The collectors of the pushpull output stage transistors are connected together and form the amplifier output. The bases of the output transistors are connected together and form the input. The resistor (18) that connects together the bases of the output transistors (20, 21) is part of the voltage divider that sets the working point of the amplifier.