4_组合逻辑电路(14)
发布时间:2021-06-11
发布时间:2021-06-11
数字电子线路基础教材
编码器--二进制编码器
输出函数:
F2=I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7
F1=I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7F0=I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7+I0I1I2I3I4I5I6I7
约束条件:I0~ I7同时只有一个取值为1;化简得:
F2=I4+I5+I6+I7F1=I2+I3+I6+I7F0=I1+I3+I5+I7
I0编码隐含:I1 ~I7均为0时,输出即为I0编码
数字电子线路基础教材
编码器--二-十进制编码器
l
二-十进制编码器:将0~9这10个信号编成二进制代码的电路。
Y0(Y0)
Y0Y1Y2Y3Y4Y5Y6Y7Y8Y9
F3
F2F1F0
F30000000011
F20000111100
F10011001100
F00101010101
1 (Y1)2 (Y2)3 (Y3)4 (Y4)5 (Y5)6 (Y6)7 (Y7)8 (Y8)9 (Y9)
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