| 摘要 |
A rail-to-rail op amp output stage is configured to provide one or more additional base drive paths for each of its output transistors, reducing the stage's distortion and increasing its maximum output current without substantially increasing quiescent current. The additional base drive paths reduce the demand on the transistors driving the output transistors, lowering the distortion they might otherwise contribute to the output current. In a preferred embodiment, the collectors of the stage's clamp transistors are connected to the bases of their opposing output transistors, so that each clamp transistor provides an additional base drive path to a respective output transistor, thereby increasing maximum output current without substantially increasing quiescent current, and substantially reducing crossover distortion.
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