OCL power amplifier with integrated op amp driver

If the power supply of this circuit is ±15V, 10W power can be obtained from the load.

The main differences between this circuit and Example 2 are:

(a) An integrated operational amplifier is used to replace the drive circuit composed of discrete components.

(b) Use D1~D3 to set the static operating point for the quasi-complementary circuit to overcome crossover distortion.

(c) Introduce voltage series negative feedback (via R3) to stabilize the operating point and amplification factor and reduce distortion.

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