给出了一种常用两级低电压CMOS运算放大器的输入级、中间增益级及输出级的原理电路图，并阐述其主要工作特性。
The principle figures of input stage middle gain stage and output stage for a usual two stage low-voltage CMOS operational amplifier and their principal performance are presented in the paper.
测定泵的输入电流、电压、转速、输出流量、输出压力、泵效率等参数，通过回归推断各参数的相关特性。
The input electric current, voltage, rotary speed, output flux and output pressure of the pump were tested. The regression relation of these parameters was deduced.
根据E类放大器的设计方程，分析了E类放大器输出功率与输入电压的特性。
According to the design equations of class-E amplifier, we have analyzed the relationships between the output power and the input voltage.
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