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opa842反向比例的问题?

Other Parts Discussed in Thread: OPA842, OPA846

我将opa842搭成反向比例的形式,结果输出的不是反向信号,但芯片的工作电流正常20ma,而且按虚短虚断去测也是满足理想运放的,不知道是什么问题?