主板是电脑中主要的电路板，其上安有处理器、内存和扩展槽，并直接或间接地与电脑各个部件相连。
Motherboard is the main computer circuit inside the PC, which holds the processor, memory and expansion slots, and connects directly or indirectly to every part of the PC.
由于IR测量往往涉及到多芯导线，所以通常需要一套切换系统来将皮安计和源切换至测试电路中的所有导线。
Ir measurements often involve multiple conductors, so a switching system is often required to switch the picoammeter and the source to all the conductors in the test circuit.
图2 - 24示出静电计或皮安计的过载保护电路，其中包括一个电阻器和两个二极管(1n3595)。
Figure 2-24 shows a protection circuit for an electrometer ammeter or picoammeter, consisting of a resistor and two diodes (1n3595).
和电压表电路一样，可以使用如图1 - 11所示的组合电路来改变皮安表放大器的增益。
Picoammeter amplifier gain can be changed as in the voltmeter circuit by using the combination shown in Figure 1-11.
请注意，在电容器被切换至皮安计之前，它是被连接到电路lo的。
Note that before the capacitor is switched to the picoammeter, the capacitor is connected to circuit LO.
因此，在本安电路中设计这些元件比设计空芯电感更有实际意义。
To design these elements in intrinsically-saf circuit is more practical than to design air-core inductance coils.
即使在1mV的正向偏置之下，1n3595的漏电流一般会小于1皮安，此电路不会影响10pa或更大电流的测量。
The leakage of the 1n3595 diode is generally less than one picoampere even with 1mv of forward bias, so the circuit won't interfere with measurements of 10pa or more.
该抄表系统硬件电路简单、成本低廉、编程方便，能在多台单片机间安会传递数据。
This system features simple hardware circuit, low cost and easy programming, while the data can be safely transfered among single chip computers.
系列位免螺丝弹簧式印刷电路板型端子台，本产品方便的接线方式极适合在通信系统照明系统安防系统与建筑物的布线使用。
Tlm screwless terminal block the tlm series suits in the communications system, the lighting system, guards against the system and the building wiring use peacefully.
通过减小栅极电路的电阻，栅极电流达到5毫安越早，和SCR之前在AC周期闪光。
By reducing the resistance of gate-circuit, the gate current reaches 5 mA sooner, and the SCR fires earlier in the ac cycle.
通过减小栅极电路的电阻，栅极电流达到5毫安越早，和SCR之前在AC周期闪光。
By reducing the resistance of gate-circuit, the gate current reaches 5 mA sooner, and the SCR fires earlier in the ac cycle.
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