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人们在制做各类电子仪器时,注意力往往放在电路的设计上面忽视印刷电路板的质量。印刷电路板的设计是否合理将直接影响到整机工作的可靠性,有可能造成逻辑器件的误动作,导至整机工作的失常,尤其是对高频数字电路。本文将对印刷电路板中数字信号线间的串扰这一容易被忽视的问题进行讨论,并通过实验的方法找出减小或消除串扰噪声的措施。 1.串扰噪声的产生 目前,仪器上所使用的印刷电路板(以下简称电
When people are making all kinds of electronic devices, attention is often overlooked in the design of the circuit board quality of the printed circuit board. Printed circuit board design is reasonable or not will directly affect the reliability of the machine work may lead to logical devices malfunction, leading to the work of the machine malfunction, especially for high-frequency digital circuits. This article discusses the problem of crosstalk between digital signal lines in printed circuit boards, which is easily overlooked, and experimentally identifies ways to reduce or eliminate crosstalk noise. 1. Crosstalk noise generated At present, the instrument used in the printed circuit board (hereinafter referred to as electricity