| 摘要 |
A push-pull amplifier having a pair of output transistors and a pair of emitter coupled resistors, one terminal of each resistor coupled to an emitter of a respective transistor and the other terminals being commonly connected to an output point. A comparison circuit is employed for comparing the voltages across each of the emitter resistors with a predetermined voltage. A bias circuit is connected in series between the bases of the output transistors and a short circuit controlled by the output of the comparison circuit selectively shorts a resistor element in the bias circuit.
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