摘要
在测量振荡信号的频率时,常用电压比较器把振荡信号变换为数字电路需要的脉冲信号。过零电压比较器结构和原理最简单,被学生实验广泛采用。大多数学生实验时总是出错,而且很难找到错误原因。造成实验出错的原因在于这种比较器抗干扰能力较弱。该文用仿真实验方法,对电压比较器实验中出现的问题进行了分析,找出了原因,提出了解决问题的方法。
The oscillation signal is often transformed to pulse signal based on integrated operational amplifier circuit when its frequency is measured. The zero-crossing comparator is widely used because the structure and principle of this circuit are simplest. However, most students make mistakes in the experiment and do not know why they make the mistakes. Zero-crossing comparator＇s anti-jamming is very weak, which always leads to mistakes. The problem of voltage eomparator is analyzed by means of simulation based on EWB. The reason of the mistakes is found out, and the way of solving the mistakes is pointed out.
出处
《实验技术与管理》
CAS
北大核心
2012年第3期42-44,共3页
Experimental Technology and Management
关键词
电压比较器
实验仿真
计数
干扰
voltage comparator
experimental simulation
count
jamming
