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。
2
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.