现代运算放大器有某种方式的推挽式的输出级，许多也是不对称的，并且某一方向的压摆率有比其它方向的有更大的倾向。

While all modern op amps have push-pull OUTPUT stages of some sort, many are still asymmetrical, and have a greater slew rate in one direction than the other.

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提出一种不对称互补的输入级结构，实现了在整个共模范围内的恒跨导。

An architecture based on non-symmetrical complementary to attain a constant-gm over the whole common mode is proposed.

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利用国内外287次5级以上的实际地震记录，用峰值不对称比描述了加速度峰值不对称性的特征和规律，提出了其估计公式。

Using the records of 287 earthquakes above the magnitude 5 the feature of the asymmetry ratio of PGA is described and the its calculation formula.

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