随着CMOS工艺中单管特征尺寸和电源电压的下降，设计高增益运算放大器很困难。

With the downscaling of CMOS process and reduction of voltage supply, it is more difficult to design high-gain OPAMPs than before.

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电路的低输入端压降以及相应的快速上升时间是由高增益运算放大器实现的。此运算放大器迫使V1接近于0。

The low voltage burden (V1) and corresponding fast rise time are achieved by the high gain op amp, which forces V1 to be nearly zero.

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该带隙电压基准源电路中的深度负反馈运算放大器为低失调、高增益的折叠型共源共栅运算放大器。

A deep negative feedback operation amplifier used in band gap reference is a common source and gate folded cascade operation amplifier with a lower offset voltage and a higher gain.

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