如果某块PC B具有低绝缘电阻(IR)，则会大大降低印制板上电路的性能。
If a PCB has low insulation resistance (ir), it can degrade the performance of the circuits on the board considerably.
影响印制板表面电阻的因素包括印制板材料、有无涂层(例如防焊漆或保形涂层)，以及电路板的清洁。
Factors that affect the surface resistance of the board include the board material, the presence of coatings such as solder masking or conformal coatings, and board cleanliness.
功率电路的印制板设计方案。
其中包括对印制板的布线、电容性耦合、数字电路的噪声容限和传输线的探讨。
It includes wiring of printed circuit board, electric capacity coupling, tolerance of digital circuit noise, and transmission line.
决定功率电路的印制板设计方案。
本文对电路印制板的测试技术进行了分类，介绍了在线测试和在线测试仪。
This paper classifies the testing technologies of PCB, introduces the on-line testing and on-line tester.
同时，为了达到微型化的设计目标，选用了低功耗的表贴元件、双层印制板制作电路板。
At the same time, For the purpose of the micromation, low-power surface mounting components and double deck printed circuit board are employed.
最后提出了用户电路板中印制板电源、地线布线设计时应注意的问题。
Finally, it indicates the problems to which one should pay more attention when designing power and ground wire in Subscriber Circuit Board.
如果单片集成电路开发设计方面等印制板布局以及网页设计。
If monolithic integrated circuit development design, aspects and so on PCB Layout as well as homepage design.
本实用新型是由双孔面板、带元件的印制板和螺钉构成，采用的是二分配器电路。
The utility model is composed of a double-hole panel, screws and a printed board with elements, and a second distributer circuit is adopted.
本实用新型是由双孔面板、带元件的印制板和螺钉构成，采用的是二分配器电路。
The utility model is composed of a double-hole panel, screws and a printed board with elements, and a second distributer circuit is adopted.
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