找到约 13704 条相关结果
... 本规范规定公司PCB板设计时EMC设计要求与注意事项，保证公司所有PCB板的EMC符合国家标准，确保产品 ... ; 本规范适用于公司所有产品PCB板的EMC设计要求规范。 ...
... 得非常重要。开关电源PCB 排版与数字电路PCB 排版完全不一样。在 ... 排版中，许多数字芯片可以通过PCB 软件来自动排列，且芯片之间的连接线可以通过PCB 软件来自动连接。用自动排版 ... 。所以,设计人员需要对开关电源PCB 排版基本规则和开关电源工作原理 ...
... low efficiency and high false detection rate of PCB manual detection, this paper designs a transfer recognition ... system to replace the manual pick-up of PCB and replay the playback detection process for specific ...
... short circuit defect between layer and layer of PCB is analyzed in detail, and the process and ... circuit of the fourth and third layers of PCB is caused by CAF. Finally, effective improvement countermeasures ...
... 加工、电路板和元器件的选用、PCB布局、元器件间距及设备要求等 ... Design for Manufacture of Print Circuit Board（PCB） mainly solves the problems of the interface ...
... 电磁兼容的关键.文章从PCB板的设计、PCB元件布局、布线等方面 ... to improve emc products. From the design of PCB, PCB components layout and wiring design, to improve the ...
... demand in electronic circuit industry, is test by PCB micro drilling test before and after optimization. The geometric parameters of PCB micro drill are optimized, and its results show ...
... problem of impedance matching existing in high-speed PCB design is studied. By analyzing the principle of high speed PCB impedance generation, the principle of impedance matching in ...
印刷电路板（PCB）的抗干扰能力是衡量PCB设计质量的重要指标之一， ... 方法可以极大地提高PCB的抗干扰能力。文章从PCB设计的基本要求出发，首先分析PCB电磁兼容性问题产生的原因，然后阐述进行PCB电磁兼容性设计的具体措施。
... Optical inspection is an important means to examine PCB assembly quality. Image segmentation technology can be used to extract object on PCB and it could be examined. The problem of ...
