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数字电子技术课后习题答案(全部)

第一章数制与编码1.1自测练习1.1.1、模拟量数字量1.1.2、(b)1.1.3、(c)1.1.4、(a)是数字量,(b)(c)(d)是模拟量1.2 自测练习1.2.1. 21.2.2.比特bit1.2.3.101.2.4.二进制1.2.5.十进制1.2.6.(a)1.2.7.(b)1.2.8.(c)1.2.9.(b)1.2.10.(b)1.2.11.(b)1.2.12.(a)1.2.13.(c)1.2.14.(c)1.2.15.(c)1.2.16.1.2.17.111.2.18.1.2.19.11011.2.20.8进制1.2.21.(a)1.2.22.0,1,2,3,4,5,6,71.2.23.十六进制1.2.24.0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F 1.2.25.(b)1.3自测练习1.3.1.1221.3.2.675.521.3.3..011.3.4.521.3.5.1BD.A81.3.6..11101.3.7.38551.3.8.28.3751.3.9..111.3.10.135.6251.3.11.570.11.3.12.120.51.3.13.2659.A1.4自测练习1.4.1.BCD Binary coded decimal 二—十进制码1.4.2.(a)1.4.3.(b)1.4.4.8421BCD码,4221BCD码,5421BCD1.4.5.(a)1.4.6. 1.10001.4.7.1.4.8.1.4.9.1.4.10.61.051.4.11..1.4.12.余3码1.4.13.XS31.4.14.XS31.4.15.1000.10111.4.16. 11.4.17.521.4.18.110101.4.19.1.4.20.(b)1.4.21.ASCII1.4.22.(a)1.4.23.ASCII American Standard Code for Information Interchange美国信息交换标准码EBCDIC Extended Binary Coded Decimal Interchange Code 扩展二-十进制交换吗1.4.24.1.4.25.ASCII1.4.26.(b)1.4.27.(b)1.4.28.1.4.29.-1131.4.30.+231.4.31.-231.4.32.-861.5 自测练习 1.5.1 略 1.5.2 1.5.31.5.4 补码形式 1.5.51.5.6 补码形式 1.5.7 补码形式 习题1.1 (a )(d )是数字量,(b )(c )是模拟量,用数字表时(e )是数字量,用模拟表时(e )是模拟量1.2 (a )7, (b )31, (c )127, (d )511, (e )40951.3 (a )22104108⨯+⨯+, (b )26108108⨯+⨯+,(c )321102105100⨯+⨯+⨯+(d )322104109105⨯+⨯+⨯+1.4 (a )212121⨯+⨯+, (b )4311212121⨯+⨯+⨯+, (c )64212+12+12+12+1⨯⨯⨯⨯(d )9843212+12+12+12+12⨯⨯⨯⨯⨯ 1.5 2201210327.15310210710110510--=⨯+⨯+⨯+⨯+⨯,3210-1-221011.0112+02+12+12+02+12=⨯⨯⨯⨯⨯⨯, 210-18437.448+38+78+48=⨯⨯⨯⨯, 10-1-2163A.1C 316+A 16+116+C 16=⨯⨯⨯⨯1.6 (a )11110, (b ),(c ), (d )1011 1.7 (a )00, (b )1.8 = 2610, 1011.0112 = 11.37510, 57.6438 = 71., 76.EB 16 = 118. 1.9 12 = 65118 = D4916,0. = 0.468 = 0.9816,. = 137.328 = 5F.6816 1.10 168 = 1410,1728 = 12210,61.538 = 49., 126.748 = 86.1.11 2A 16 = 4210 = = 528, B2F 16 = = 12 = 54578, D3.E 16 = 211.87510 = .11102 =323.78, 1C3.F916 = 451. = . = 703.7628 1.12 (a )E, (b )2E, (c )1B3, (d )349 1.13 (a )22, (b )110, (c )1053, (d )2063 1.14 (a )4094, (b )1386, (c )49282 1.15 (a )23, (b )440, (c )27771.16 = 2 = BCD , 67.31110 = . = .18421BCD , 1. = 1. = 0001.BCD , 0. = 0. =0000.BCD1.17 1310 = 1BCD = XS3 = 1011Gray , 6.2510 = 0110.1BCD = 1001. XS3 = 0101.01Gray ,0.12510 = 0000.18421BCD = 0011.0XS3 = 0.001 Gray 1.18 = 11101 Gray , = Gray1.19 = 18421BCD , 45610 = 08421BCD , 1748 =08421BCD , 2DA 16 = 08421BCD , 1BCD=,XS3 = 1BCD1BCD1.20 0.0000原= 0.0000反= 0.0000补,0.1001原= 0.1001反= 0.1001补,11001原= 10110反= 10111补1.21 原= 补,原= 补,原= 补,原= 补1.22 1310 = 补,11010 = 补,-2510 = 补,-90 = 补1.23 补= 11210,补= 3110,补= -3910,补= -56101.241.251.26 BEN SMITH1.271.28第二章逻辑门1.1 自测练习2.1.1. (b)2.1.2. 162.1.3. 32, 62.1.4. 与2.1.5. (b)2.1.6. 162.1.7. 32, 62.1.8. 或2.1.9. 非2.1.10. 12.2 自测练习2.2.1. F A B=⋅2.2.2. (b)2.2.3. 高2.2.4. 322.2.5. 16,52.2.6. 12.2.7. 串联2.2.8. (b)2.2.9. 不相同2.2.10. 高2.2.11. 相同2.2.12. (a)2.2.13. (c)2.2.14. 奇2.3 自测练习2.3.1. OC,上拉电阻2.3.2. 0,1,高阻2.3.3. (b)2.3.4. (c)2.3.5. F A B=⋅, 高阻2.3.6. 不能2.4 自测练习1.29 TTL,CMOS1.30 Transisitor Transistor Logic1.31 Complementary Metal Oxide Semicoductor1.32 高级肖特基TTL,低功耗和高级低功耗肖特基TTL1.33 高,强,小1.34 (c)1.35 (b)1.36 (c)1.37 大1.38 强1.39 (a)1.40 (a)1.41 (b)1.42 高级肖特基TTL1.43 (c)习题2.1 与,或,与2.2 与门,或门,与门2.3 (a)F=A+B, F=AB (b)F=A+B+C, F=ABC (c)F=A+B+C+D, F=ABCD 2.4 (a)0 (b)1 (c)0 (d)02.5 (a)0 (b)0 (c)1 (d)02.6 (a)1 (b)1 (c)1 (d)12.7 (a)4 (b)8 (c)16 (d)322.8 (a)3 (b)4 (c)5 (d)6A B C F0 0 0 00 0 1 10 1 0 10 1 1 01 0 0 12.9 (a )(b ) A B C D F 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 1 1 0 1 0 0 0 0 1 0 1 1 0 1 1 0 1 0 1 1 1 0 1 0 0 0 0 1 0 0 1 1 1 0 1 0 1 1 0 1 1 0 1 1 0 0 1 1 1 0 1 0 1 1 1 0 0 1 11112.10 Y AB AC =+2.11A B C Y 0 0 0 0 0 0 1 0 0 1 0 1 0 1 1 1 1 0 0 0 1 0 1 1 1 1 0 0 11111 0 1 0 1 1 0 0 11 1 12.122.13F1 = A(B+C), F2=A+BCA B C F1F20 0 0 0 00 0 1 0 00 1 0 0 00 1 1 0 11 0 1 1 11 0 0 0 11 1 0 1 11 1 1 1 12.142.15 (a)0 (b)1 (c)1 (d)02.16 (a)1 (b)0 (c)0 (d)12.17 (a)0 (b)02.182.19 Y AB BC DE F=⋅⋅⋅2.20 Y AB CD EF=⋅⋅2.21 102.22 402.23 当TTL反相器的输出为3V,输出是高电平,红灯亮。

当TTL反相器的输出为0.2V时,输出是低电平,绿灯亮。

2.24 当TTL反相器输出高电平时三极管会导通,LED灯会点亮;当TTL反相器输出低电平时三极管不会导通,LED灯不会点亮。

3.1自测练习答案1. 逻辑函数2. 逻辑表达式、真值表、逻辑电路图、卡诺图和波形图3.F=真值表表3-1ABCA B CABCF=0 0 0 10 0 1 10 1 0 10 1 1 11 0 0 11 0 1 11 1 0 11 1 1 04.5. (略)3.2自测练习答案1. 与、或、非2. 代入规则 、 反演规则、 对偶规则3. a 和 c4. a d5. a6. D C B A +、D C AB +7. )(E D C B A ++、)(E D C B A ++ 8. *F F =3.3自测练习答案1. A2. AD3. AC D +4. B AC +5. BC C A +6. B A +7. C AB +8. C A AB +9. C A AB +3.4自测练习答案1. 标准与或表达式、 标准或与表达式2. 1、12-n3. n24. 最大项5. 4,5,6,7,12,13,14,156. )5,4,3,1(M ∏7. )4,2,0(M ∏8. )7,5,4,1,0(m ∑9.A B C F 0 0 010. D BC A D C B A +11. ))((D C B A D C B A ++++++ 12. C3.5自测练习答案1. 12. n2 3. 格雷码4.C B A 、C B A ++5. m 66. M 17.8.9.0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 0 0 1 1 1 0 110.)7,6,5(d ∑第三章练习答案3.1、C AB C B A BC A F ++= 3.2、(a)1,0,0 (b)1,1,1 (c)0,1,03.3.略3.4.(a)))()((D C A C B B A F +++= (b))]))([(G F E D C B A F ++++= 3.5(a)))((*C B C A F ++= (b)D E D C B A F )]([*++=3.6 提示: 列出真值表可知: (1)不正确, (2)不正确, (3 正确, (4) 正确 3.7(a )B A F = (b )ABD ABC + (c )C B BC A F ++=(d )0=F (e )C B F += (f )C B D B AB ++ (g )BC F = (h )0=F(i)C B A F +=(j)C A C B AB F ++=3.8 ()()∏=∑=6,5,4,2,0)7,3,1(,,M m C B A F 3.9 (a) ())7,6,5,4,1(,,m C B A F ∑=(b) (),,,(4,5,6,7,9,12,14)F A B C D m =∑ 3.10 函数Y 和函数Z 互补, 即:Y Z Z Y ==, 3.11、0 0 0 0 0 0 0 0 ABCD11 0000 0111 10 01 103.12D C A CD A D B BC B A D C A CD A D B BC B A F ∙∙∙∙=++++=3.13 D C B A F +=3.14 CD B A D C A F +=1 C B B A D F ++=2 D C B B A D C A A C D F +++=3 3.15 ACD C A B A F ++= 3.163.17习题4.1写出图所示电路的逻辑表达式,并说明电路实现哪种逻辑门的功能。

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