基本单限比较器电路图.ewb

Multisim2001软件的仿真电路实例261例

Electronics Workbench Circuit File
Version: 5
Charset: ANSI
Description: 
"基本单限比较器电路图" 
"        电压比较器的基本功能是对两个送到输入端的电压进行比较，判断出其中哪一个大，在输出端显示出比较结果。输入端的两个电压，可以一个是模拟信号，另一个是参考电压，也可以两个都是模拟信号。而作为显示比较结果的输出信号，则是两种不同的电平，高电平或低电平，即数字信号“1”或“0”。对于电压比较器，技术指标为：门限电压和分辨度、响应速度。" 
"        电压比较器是作为模拟电路和数字电路之间的接续电路使用的，所以人们把它归属于所谓接口电路。当输入电压低于参考电压（电池提供的电压）时，输出电压为正，反之为负。" 
"        若加一个电阻接于图中所示的紫红线之间，则电路成为加有正反馈的单限比较器。可克服输入信号在门限值附近有微小的干扰时，输出电压将产生相应的抖动（起伏）这一缺点。" 
"" 

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