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集成运放OPA37差分电路输入电阻取值问题

Other Parts Discussed in Thread: OPA37

如上电路图示应用中,运放前级的差分输入电阻值范围怎么限制,它的选值与运放的差模输入阻抗和共

模输入阻抗有什么关系。是不是可以无限的取大?