So the cascade multilevel inverters have been used in many industrial application fields such as fan or pump and the good saving-energy effect has been gotten.
采用模块化安装，易于扩展和维修，并具有冗余功能。现已广泛应用于风机、泵类负载调速场合，取得很好的节能效果。
In conventional CMOS charge pump circuits, the pumping high voltage is limited by MOS threshold voltage, so that it can not use less cascade stages to pull up a high voltage which we want to generate.
在传统的CMOS电荷泵电路中，电荷泵输出的电压受MOS管的阈值电压限制，所以当要求电荷泵的输出电压较高时，则不得不连很多阶来达到要求。
In conventional CMOS charge pump circuits, the pumping high voltage is limited by MOS threshold voltage, so that it can not use less cascade stages to pull up a high voltage which we want to generate.
在传统的CMOS电荷泵电路中，电荷泵输出的电压受MOS管的阈值电压限制，所以当要求电荷泵的输出电压较高时，则不得不连很多阶来达到要求。
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