Chapter 9: PRACTICAL ANALOG SEMICONDUCTOR CIRCUITS

Amplifier Circuits -- PENDING

Note, Q₃ and Q₄ in Figure below are complementary, NPN and PNP respectively. This circuit works well for moderate power audio amplifiers. For an explanation of this circuit see “Direct coupled complementary-pair”, Ch 4 .

Direct coupled complementary symmetry 3 w audio amplifier. After Mullard. [2]