LM321

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9

LM321 has a class B output stage, which is comprised of

push−pull transistors. This type of output is inherently

subject to crossover distortion near mid−rail where neither

push or pull transistors are conducting. Several techniques

can be used to minimize crossover distortion. Connecting

the output load to either the positive or negative supply rail

instead of mid−rail can reduce the crossover distortion.

Additionally, increasing the load resistance relatively

decreases the amount of crossover distortion.

VCC

VEE

OUT

Figure 20. Simplified Class B Output

Figure 21. Sine wave with crossover distortion