四选一数据选择器.ewb

Multisim2001软件的仿真电路实例261例

Electronics Workbench Circuit File
Version: 5
Charset: ANSI
Description: 
"         数据选择器也称多路选择器或多路开关，其基本逻辑功能是在选择信号控制下，从若干路输入数据中选择一路作为输出。该图为4选1数据选择器。当使能输入端ST`=0时，输出函数表达式为：" 
"                                Y=A1`A0`D0+A1`A0D1+A1A0`D2+A1A0D3" 
"         式中D0~D3为输入数据，A1A0为通道选择控制端（又称地址端）。例如，A1=0；A0=0时，Y=D0，说明数据D0被选中并输出。依次类推，这种由地址信号选择通道让数据输出的电路即为数据选择器。" 
"         四选一数据选择器真值表：" 
"	ST`		A1A0		Y" 
"	 0		 0   0		D0" 
"	 0		 0   1		D1" 
"	 0		 1   0		D2" 
"	 0		 1   1		D3		" 

EncryptionType: 2
UsingVectorGraphics: 0
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