Usually, this method requires two instruments: a voltage source and a picoammeter or electrometer.

通常，这种方法需要使用两台仪器：一台电压源和一台皮安计或静电计。

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It consists of a voltage-controlled current source, a voltage-controlled voltage source and a voltage source.

该模型由一个电压控制电流源、一个电压控制电压源和一个电压源构成。

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Figure 2-39 shows an electrometer connected to a current source that consists of a voltage source in series with a resistor.

图2 - 39所示为静电计和由电压源及电阻器串联组成的电流源相连接。

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Although the exact mechanism is still not entirely understood, it turns out that illuminating the liquid crystal, applying a voltage across a small region of it, and then turning off the light source causes a small amount of charge to be stored in that region.

ECONOMIST: Just press print