摘要
为了保护计算机主机显示卡,方便计算机显示器的检测、维修,利用EDA软件Protel99SE设计了计算机显示信号源,它由555时基电路、门电路、计数器构成。计算机显示信号源能显示棋盘图形,使用时,可根据需要随时开关显示器,且无需考虑信号源的安全,使开关显示器的操作变得简单、快捷,给显示器的检测、维修带来极大的方便。
In order to protect the display card of the host computer and make it convenient for the test and maintenance of computer display, designed a display signal source composed of 555 time-base circuit, gate circuit, and counter for the computer with Protel99se. The display signal source of computer can display checkerboard patterns, turn on and off the display momentarily as requested, and also need not consider security of the signal source, which make the the computer display on or off simply and rapidly, and take more convenient for the test and maintenance of computer display.
出处
《电脑知识与技术（过刊）》
2010年第9X期7354-7356,共3页
Computer Knowledge and Technology
关键词
垂直亮线信号
水平亮线信号
仿真分析
消隐
signal of vertical and bright line
signal of horizontal and bright line
simulation analysis
blanking
