In electronics, a circuit for converting AC voltage to low voltage DC in such a way that the output is regulated to minimize noise and voltage fluctuation.
在电子技术中，把交流电转换成低电压直流电的一种电路。这种电路的输出是经过调整的，使它的噪声及电压波动都很。
When measuring low current, electrostatic shielding (as discussed in Section 2.6.2) is the most common way to reduce noise due to AC interference.
在测量弱电流时，静电屏蔽(如第2.6.2节所讨论)是降低交流干扰引起的噪声的最常用的方法。
However, when the hi terminal of the electrometer is connected to the low impedance power supply, this AC current (I) flows through the electrometer (im), as illustrated in Figure 2-41.
然而，如果静电计的HI端连到电源的低阻端，则该交流电流(i)就流过静电计(IM)，如图2 - 41所示。
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