7.4QQNRS00011011SR维持原态01100*0*QQNQNQ7.5QQNRS7.6利用带有使能端的T触发器和组合逻辑构造D触发器D触发器:Q*=D(转移方程)T触发器的特征方程:Q*=EN·Q’+EN’·Q=ENQ所以,激励方程:EN=DQJK触发器:Q*=J·Q’+K’·QT触发器:Q*=EN·Q’+EN’·Q激励方程:EN=(J·Q’+K’·Q)Q=J·Q’+K·Q7.7利用带有使能端的T触发器和组合逻辑构造J-K触发器Z7.12Excitationequations:XQD22211QQDOutputequation:21QQZQ1Q2=00~11,A~D7.18D1D2D0Q2Q1Q0=000~111,A~H7.20EN1EN2Y1Y’7.21对B状态,不满足完备性,少了Y’对C状态,不满足完备性,少了Y对A状态,不满足完备性,少了X’Z对B状态,不满足互斥性,多了(W+Y)(X+Z),少了W’X’Y’Z’对C状态,不满足互斥性,多了(W+Z)(X+Y),并且不满足完备性,少了W’X’Y’Z’对D状态,不满足互斥性,多了WYZ+WX’Z,并且不满足完备性,少了(WZ+XY)’W+YX+ZWX’ZW’Y’X’YZX’Z’对A状态,不满足完备性,少了(X+YZ)’对B状态,不满足互斥性,多了W’Y’对C状态,满足二义性对D状态,不满足互斥性,多了XY,并且不满足完备性,少了(X+Y’)’IDLEL1LL21L311R1RR21R311LR3H1H’·L’·R’L·H’·R’H’HH’HH+L·RHHR·H’·L’H’H’7.24修改状态图IDLEL1LL21L311R1RR21R311LR3H1H’·L’·R’H+L·RL·H’·R’R·H’·L’H+LRH+LRH+LRH+LRH’(L’+R’)H’(L’+R’)H’(L’+R’)H’(L’+R’)Q2Q1Q0S转移表达式S*Q2*Q1*Q0*H’·L’·R’L·H’·R’R·H’·L’H+L·R000000000000000001101100IDLEIDLEL1R1LR3L1001001L2LR3011000H’·(L’+R’)H+LRL2011011L3LR3010000H’·(L’+R’)H+LRL3010IDLE0001R1101101R2LR3111000H’·(L’+R’)H+LRR2111111R3LR3110000H’·(L’+R’)H+LRR3110IDLE0001LR3100IDLE00011111Transitionlist7.44输入信号:1表示有效,0表示无效7.46A=00,B=01,C=11,D=10(D1D2)D1D1D2D27.54Q1Q2Q3XQ1*Q2*Q3*/HU0001111000011110001/1000011/1001110/1000010/1001001001000111/1101/1001/11100/1110''''''3123231223''''''21323123123''''112312123DQQQQQXQQQQXDQQXQQXQQQXQQQXDQQQXQQXQQQ''''''3123231213DQQQQQXQQQQX或