数字逻辑第一章课后答案
1-1 (1)(1011.10101)2 =(13.52)8=(0B.A8)16=(11.65625)10 (2)(1110.11001)2 =(16.62)8=(0E.C8)16=(14.78125)10 (3)(110110.111)2 =(66.7)8=(36.E )16=(54.875)10 (4)(10101.0011)2 =(25.14)8=(15.3)16=(21.1875)10 1-2 (1)(105.625)10 =(1101001.101)2=(69.A )16 (2)(27/64)10 =(0.011011)2=(0.6C )16 (3)(37.4)10 =(100101. 01100110)2=(25.66)16 (4)(42.375)10 =(101010. 011)2=(2A.6)16 (5)(62/128)10 =(0.0111110)2=(0.7C )16 (6)(9.46)10 =(1001. 01110101)2=(9.75)16 1-3 (1)(AB.7)16 =(10101011. 0111)2=(171.4375)10 (2)(3A.D )16 =(111010. 1101)2=(58.8125)10 (3)(5F.C8)16 =(1011111. 11001)2=(95.78125)10 (4)(2E.9)16 =(101110. 1001)2=(46.5625)10 1-4
(1)真值表 (2)真值表
逻辑函数表达式: 逻辑函数表达式:
F =A ⋅B ⋅C ⋅D +A ⋅B CD +A B C ⋅D +A BC D +A B ⋅C D +A B C D +AB C ⋅D +ABCD F =⋅⋅+BC +AB + 1-5
(1)反函数: F =(A +B ) ⋅C +A =(A +B ) A ⋅C =ABC 对偶函数: F ' =(A +B ) ⋅C +A
(2)反函数: F =(A +B ) ⋅(A +B ) ⋅C =(A ⋅B +A ⋅B ) ⋅C =(A ⊕B ) C 对偶函数: F ' =(A +B ) ⋅(A +B ) ⋅C
(3)反函数: F =(A +(B ⋅C ) ) ⋅((A +C ) ⋅(B +D ) +E ) =(+B +) ⋅((+) ⋅(+) +) 对偶函数: F ' =(A +(B ⋅C ) ) ⋅((A +C ) ⋅(B +D ) +E )
(4)反函数: F =A ⋅C +(A +B +C ) ⋅(A +C +D ) =A ⋅+⋅C ⋅D 对偶函数: F ' =A ⋅C +(A +B +C ) ⋅(A +C +D )
1-6
1-9
1-17
1-18
1-19
1-7
1-8
1-11
可配项或类似卡诺图方法
1-13
1-14
1-15
1-16
根据真值表得逻辑表达式: F =D C B ⋅A +D CB A +D C ⋅B ⋅A +D C B A +DC B ⋅A
D ⋅C ⋅B ⋅A +D ⋅C ⋅B A +D ⋅C B A +DC B A +DCB A +DCBA =0
约束条件
如果不利用约束项化简:
化简后得:
F =C B ⋅A +D C A +D C ⋅A
D ⋅C ⋅
B ⋅A +D ⋅C ⋅B A +D ⋅C B A +DC B A +DCB A +DCBA =0
约束条件
如果利用约束条件:
化简后得:
=A
⋅C ⋅B A +DC B A +DCBA =0
约束条件