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OPA846: 无限增益多反馈高通滤波器

Part Number: OPA846

采用ADI公司的LT1809,巴特沃斯4阶高通滤波器(K=1)增益为1参数能正常工作,但OPA846无法正常工作,可能是什么原因呢?

LT1809与OPA846区别在哪呢