By comparing the heating effect of an unknown AC signal to that from a known DC reference, metrologists can determine the RMS AC quantity (voltage or current) in terms of the DC quantity.
为了对比一个已知直流参考的未知交流信号热效应，计量人员可以确定在一段时间内直流的交流有效值(电压或电流)。
Reference source outputs a stable reference signal which is independent of power supply voltage, temperature and process.
其输出的基准信号稳定，与电源电压、温度以及工艺的变化无关。
The reference signal in this control approach is obtained by detecting both source current and load voltage.
该控制方式的指令信号通过同时检测电源电流和负载电压得到。
MSP430F449 has abundant internal resource, but itself 12 b A/DC negative pole reference voltage can′t be lower than 0V. It has brought the difficulty in measuring alternating current signal.
MSP430F449单片机内部资源丰富，但是他本身自带的12位A/DC参考电压中的负极最低不能小于0V电压，对于交流信号的测量带来了困难。
Each module is controlled by voltage current two closed loops. The common voltage loop controls system output voltage & frequency, and generates a common reference current signal.
三台航空静止变流器模块均为电压、电流双环控制，通过公用电压调节器稳定并联系统的输出电压及频率，同时产生统一的模块电流给定信号。
Receiving the third signal and based on a reference voltage, the switching circuit controls the pulse wave width of the switching signal so as to adjust output current of the power converter.
切换电路接收第三讯号并依据一参考电压，以控制切换讯号的脉波宽度，所以可调整功率转换器的输出电流。
Each module is controlled by voltage-current two closed-loops. The common voltage loop controls system output voltage & frequency, and generates a common reference current signal.
每台航空静止变流器模块均为电压、电流双环控制，通过公用电压调节器稳定并联系统的输出电压及频率，同时产生统一的模块电流给定信号。
The reference capacitor can charge at a third clock phase, thus the input signal is released from the capacitor dependently from the voltage.
参考电容器可以在第三时钟相位放电，这样输入信号依赖电压从电容器被释放。
The reference capacitor can charge at a third clock phase, thus the input signal is released from the capacitor dependently from the voltage.
参考电容器可以在第三时钟相位放电，这样输入信号依赖电压从电容器被释放。
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