The method of instantaneous value comparison for source current control of unity power factor rectifier possesses advantages of simplicity as well as valid restriction for maximum switching frequency.
在单位功率因数整流器中，利用瞬时值比较法来控制电源电流，不但控制简单，还可有效限制器件的最高开关频率。
This instrument has a digital display, which can print the instantaneous, mean value and maximum of measured temperature conveniently.
仪器采用数字显示，并可随时打印记录温度的瞬时值、平均值与最高值。
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