专用键盘的电磁兼容性设计  

Electromagnetic Compatibility Design On Special Keyboard

作　　者：姚维[1] 朱弘强[1] 

机构地区：[1]华东计算技术研究所,上海200233

出　　处：《计算机工程》2008年第B09期125-127,共3页Computer Engineering

摘　　要：论述了为某型号计算机配套的专用键盘电磁兼容性设计问题。通过试验确定了专用键盘的干扰源及干扰的传递途径,采用机箱屏蔽技术和电缆屏蔽技术来切断电磁辐射的途径,以电容作为信号滤波器对键盘芯片进行滤波处理,并通过理论计算确定电容值。实践证明上述措施能有效抑制和防止电磁干扰。This paper discusses the problem of a comprehensive keyboard design of the electromagnetic compatibility. The keyboard supports a certain model of computer. Diagnostic tests identify the source of interference for the keyboard and interfere with the transmission channels. It uses chassis shielding technology and cable shielding technology to cut off the channels of electromagnetic radiation. Capacitor is used as a signal filter in the keyboard chip processing. Capacitance values are determined through theoretical calculations. Practices prove that these measures can effectively curb and prevent electromagnetic interference.

关 键 词：专用键盘 电磁兼容性 抗电磁干扰源 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]