For this, I adopt the new differential input stage to make input common mode range enlarged, and as far as possible not reduce its gain.

为此，采用了新的差分输入级，使共模范围增大，同时尽量不减少差分输入级的增益。

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A measurement amplifier circuit is designed, which consists of circuits of differential amplifier, a common-mode rejection, double-end and single-end conversions and programmed gain amplifier.

设计了一个测量放大器电路，它由差动放大电路、共模抑制电路、双端单端转换电路和程控增益放大电路组成。

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