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最近需要用到咪头采集人体的生理信号，咪头的灵敏度在-34dB以上，信噪比大于58dB,频率响应范围在20Hz到16000Hz。不过昨天我将咪头的两个引脚接入OPA1612放大电路没有任何信号，想问一下咪头采集电路是怎样的？另外由于后期要进行放大和滤波，滤波后再20Hz到1500Hz，想问一下除了OPA1612芯片，是否还有更好的推荐？谢谢。
咪头采集的话，可以考虑LMV1012，LMV1032.
除了OPA1612的话，还可以看下OPA2134。
