Low-Frequency Voltage Amplifier 低频电压放大器
low frequency voltage endurance 低频耐压
low frequency voltage withstand 低频耐压
low frequency voltage-withstand 低频耐压
low frequency voltage injection 低频电压注入式
low frequency voltage compensation 低频电压补偿
very low frequency voltage test 超低频耐压试验
The paper introduces the precise measuring circuit of ultra-low frequency voltage based on the characteristics of the measurement of ULF.
根据超低频电压信号测量的特点，给出了一种精密测量电路。
The main circuit is consisted of 18 thyristors circuit and protection circuit. With the help of control subsystem, it can get the output of low frequency voltage (current) with the shape of sine wave;
主回路采用由18个晶闸管组成的三相零式电路，并辅以晶闸管的保护电路，通过控制可以得到低频正弦波的电压（电流）输出；
Orthogonal Multi-Carrier Modulation(OMCM) is adopted to overcome the frequency selectivity and time variation of low-voltage power line channel.
为克服低压电力线信道的频率选择性和时变性，系统采用正交多载波方式传输信息。
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