异步减法计数器.ewb

Multisim2001软件的仿真电路实例261例

Electronics Workbench Circuit File
Version: 5
Charset: ANSI
Description: 
"         该图是用4个JK触发器构成的异步二进制减法计数电路。它和异步加法计数电路没有很大差别。只是第二级以后的时钟脉冲由前一级的Q`端接入，其它分析相同。" 
"         异步减法计数器状态转移表：" 
"         序			原状态				次状态" 
"         号		Q4	Q3	Q2	Q1	Q4	Q3	Q2	Q1" 
"          0		 0	 0	 0	 0	 1	 1	 1	 1" 
"          1		 1	 1	 1	 1	 1 	 1	 1	 0" 
"          2		 1	 1	 1	 0	 1	 1	 0	 1" 
"          3		 1	 1	 0	 1	 1	 1	 0	 0" 
"          4	 	 1	 1	 0	 0	 1	 0	 1	 1" 
"          5	 	 1	 0	 1	 1	 1	 0	 1	 0" 
"          6	 	 1	 0	 1	 0	 1	 0	 0	 1" 
"          7		 1	 0	 0	 1	 1	 0	 0	 0" 
"          8		 1	 0	 0	 0	 0	 1	 1	 1" 
"          9	 	 0	 1	 1	 1	 0	 1	 1	 0" 
"          10		 0	 1	 1	 0	 0	 1	 0	 1" 
"          11		 0	 1	 0	 1	 0	 1	 0	 0" 
"          12		 0	 1	 0	 0	 0	 0	 1	 1" 
"          13		 0	 0	 1	 1	 0	 0	 1	 0" 
"          14		 0	 0	 1	 0	 0	 0	 0	 1" 
"          15		 0	 0	 0	 1	 0	 0	 0	 0" 

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