该晶闸管触发器采用集成运数放大器，移相触发脉冲的形成是根据三相交流电的各相与移相控制电压直接比较原理实现的。
The shift trigger pulse of the thyristor trigger circuit with integration amplifier is generated by comparing directly principle of three-phase AC and shift-phase control voltage.
图25是一个平均值输出，有效值刻度的交流电压表头放大电路。
The circuit shown in Figure 25 is the heart of an average reading, rms calibrated AC voltmeter.
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