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关于OPA2735设计带通滤波器问题

Other Parts Discussed in Thread: OPA2735

用OPA2735设计了带通滤波器,如图所示:

OPA2735为双通道输入,做好PCB板后并焊接好元器件后,给±3.4V电压供电,用示波器测试IN1P和IN1N,

IN1P显示如下:为正常

IN1N波形如下,自动产生了一个输出波形:

正常情况两通道输出都一样且没有波形输出,然而实际出现以上问题,求各位帮忙解答!