UA741运放调零电路是怎样的呀？还有调完零之后直接把调零电路撤了就行吧？？？？？？？？？？？？？？？ 对运放uA741如何实现调零，为什么交流电压放大器不需调零？
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电位器两端接运放的两个调零端，滑动段接负电源。
调零正常后要一直使用，不可以拆除。
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