The results show that available power and power input of water pump continuously decline with motor frequency reducing, and pump efficiency also decrease at the same time.
结果水泵有效功率和输入功率均随着电机频率的下降而不断降低，同时水泵效率也随着频率下降而降低。
According to the amplitude of the input signals, the charge pump has two level output voltage rails available to save power.
根据输入信号的幅度，该电荷泵可以提供两档电压轨来节省功耗。
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