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OPA695偏置问题

Other Parts Discussed in Thread: OPA695, OPA836

你好,电路如上图,运放用的为OPA695,现在遇到的问题是同相端偏置电压不能按照电位器与固定电阻的比例来进行调节(电位器调到最大阻值时同相端电压为800mv),如果把OPA695取下来,则分压正常。希望得到大师的指点,晚辈在此谢过。