摘要：要了解如何创建，然后抑制共模信号，你首先应该了解在普通电缆配置盾牌和理由的互动。下面的讨论中定义了一个共模信号，回顾了常见的电缆配置，考虑屏蔽与非屏蔽电缆，并介绍了典型的接地措施。文章论述了创建和拒绝，使共模信号的方法。Maxim/Dallas > App Notes > AMPLIFIER AND COMPARATOR CIRCUITS AUDIO CIRCUITS COMMUNICATIONS CIRCUITS INTERFACE CIRCUITS VIDEO CIRCUITS Keywords: common-mode signals, network, transmission lines, shielded cables, unshielded cables, RS-485, May 21, 2003 RS485, RS-422, RS422, APPLICATION NOTE 2045 Understanding Common-Mode Signals Abstract: To understand how common-mode signals are created and then suppressed, you should first understand the interaction of shields and grounds in common cable configurations. The following discussion defines a common-mode signal, reviews the common cable configurations, considers shielded vs. unshielded cables, and describes typical grounding practices. The article discusses methods whereby common-mode signals are created and rejected. The primary focus ……