摘要
数字电路有三种状态:高电平、低电平和高阻状态,有些应用场合不希望出现高阻状态,可以通过采用上拉电阻或下拉电阻的方式使处于稳定状态。阐述了上、下拉电阻的作用及选用原则,并结合实际应用实例进行了分析。
The digital circuit has three conditions：High level,low level and high -resistance condition, Some application situation did not hope that has the high -resistance condition, May through use on pulls the resistance or under puUs the resistance the way to cause to be at the steady state. This article elaborated pulls the resistance up and down the function, selects the principle, and gives the practical application example.
出处
《河南机电高等专科学校学报》
CAS
2009年第3期9-10,共2页
Journal of Henan Mechanical and Electrical Engineering College
关键词
上拉电阻
下拉电阻
高电平
低电平
pull - up resistor
pull - down resistor
high level
low level
