voltage sag电压下降voltagen.电压voltage-stable transistor稳压晶体管voltage frequency converter电压频率变换器voltage proportional method电压比测量法voltage stabilizing circuit稳压电路voltage multiplying circuit电压倍增电路voltage stabilization power稳压电源voltage-regulation factor电压调整因数voltage-controlled source电压控制电源voltage-stabilized source电压稳定的电源voltage-doubler rectifier倍压整流器,二倍压整流