数字设计原理与实践 第六章答案.doc

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膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂蒃袂聿蒄虿袈肈芄蒁螄肇莆螇蚀肇葿薀羈肆膈螅袄肅芁薈螀膄莃螃蚆膃蒅薆羅膂膅荿羁膂莇薄袇膁蒀蒇螃膀腿蚃虿腿节蒆羇膈莄蚁袃芇蒆蒄蝿芆膆虿蚅芆芈蒂肄芅蒀蚈羀芄薃薀袆芃节螆螂衿莅蕿蚈衿蒇螄羇羈膇薇袃羇艿螃蝿羆莁薅蚅羅薄莈肃羄芃蚄罿羃莆蒆袅羃蒈蚂螁羂膈蒅蚇肁芀蚀羆肀莂 6.2 demorgan equivalent symbol for a 7430 8-input nand gate 6.3 demorgan equivalent symbol for a 7427 3-input nor gate6.9 156=90ns6.20(a) f=x,y,z(2,4,7) u174hc138y015y114y213y312y411y510y69y77a1b2c3g16g2a4g2b5u2a74hc10r1vccgndzyx(b) f=a,b,c(3,4,5,6,7)u174hc138y015y114y213y312y411y510y69y77a1b2c3g16g2a4g2b5u2a74hc10r1vccgndabc(c) f=a,b,c,d(0,2,10,12)u174hc138n_4vy015y114y213y312y411y510y69y77a1b2c3g16g2a4g2b5u2a74hc20n_4vr11kvcc5vgndabcdf(d) f=w,x,y,z(2,3,4,5,8,10,12,14)(e) f=w,x,y(0,2,4,5), g=w,x,y(1,2,3,6)(f) f=a,b,c(2,6), g=c,d,e(0,2,3)6.21 when the en_l signal is asserted, the two part of the 74xx139 will be chosen simultaneously and it will cause fighting in the party-line. we could add an inverter to either of the enable input 1g_l or 2g_l to solve this problem.6.22 74ls138: g1- out 38ns g2a_l,g2b_l - out 32ns any select-out 41ns 74ls151: any selecty 32ns any data y 20ns enable y 30ns 74ls20: 15nsthe maximum propagation delay =41+32+15=88ns6.24 even number of xnor gatesone xnor gateits an even-parity circuit. 6.38 truth bableinputoutputabcdy9y8y7y6y5y4y3y2y1y0000000000000010001000000001000100000000100001100000010000100000001000001010000100000011000010000000111001000000010000100000000100110000000001010dddddddddd1011dddddddddd1100dddddddddd1101dddddddddd1110dddddddddd1111dddddddddd11d111d111dd11ddyi(i=09)abcdy9=ady8=ady7=bcdy6=bcdy5=bcdy4=bcdy3=bcdy2=bcdy1=abcdy0=abcd6.43 6.50i9i8i7i6i5i4i3i2i1i0y3y2y1y010000000001111010000000011100010000000011100010000000110000010000001010000010000010000000010000011000000010000100000000010000100000000010000y3=i9+i8y2=i9+i8+i7+i6+i5+i4y1= i9+i8+i7+i6+i3+i2y0= i9+i7+i5+ i3+i16.51 nand=not-ori15i14i13i12i11i10i9i8i7i6i5i4i3i2i1i0dcba01111011100110101100010110101001001010000011100110001010010000011000100000100000d=i15+i14+i13+i12+i11+i10+19+18c= i15+i14+i13+i12+i7+i6+i5+i4b= i15+i14+ i11+i10+ i7+i6+i3+i2a= i15 +i13+i11 +19+ i7 +i5 +i3+i16.52 6.53 u174ls148na09a17a26gs14d313d41d52d212d111d010d74d63ei5eo15ei_li7_li6_li5_li4_li3_li2_li1_li0_la0a1a2avalideou2a74hc05n_4v6.63 truth table: let s1,s0 to be select signals, a0:4, b0:4, c0:4 are the 5-bit input data, y0:4 is the output.inputoutputs1s0y0y1y2y3y400a0a1a2a3a401b0b1b2b3b410c0c1c2c3c41100000y0=s1s0a0+s1s0b0+s1s0c0y1=s1s0a1+s1s0b4+s1s0c1y2=s1s0a2+s1s0b2+s1s0c2y3=s1s0a3+s1s0b3+s1s0c3y4=s1s0a4+s1s0b4+s1s0c4s1s1a0a1a2a3a4b0b1b2b3b4c0c1c2c3c4y0y1y2y3y4vccgnd6.74 selecting circuitpqrts2s1s0sasby33333let sa sb=00, select p =01, q =10, r =11, tso, s2s1s0sasby00000p00100p01000p01101q10000p10100p11010r11111tgot,sa=s1s2sb=s1s0 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