Present state 0=1 0=0 R=1,S=0 Q Q & & R 0S0 Output next state 0=10=0
Q = 1 Q'= 0 0 0 1 1 0 1 0 1 & a & b Q' Q R S Present state R=1, S=0 Output next state Q = 1 Q'= 0
Present state 0=1 0=0 R=1,S=1 Q & & R Output next state 0=10=0
R=1, S=1 0 1 1 1 1 0 0 1 & a & b Q' Q R S Present state Q = 1 Q'= 0 Output next state Q = 1 Q'= 0
Present state 0=00=1 R=1,S=1 Q & & R Output next state 0=0 2=1
1 0 1 0 1 1 1 0 & a & b Q' Q R S R=1, S=1 Present state Q = 0 Q'= 1 Output next state Q = 0 Q'= 1
R=0,S=0 Present state Q & & R Output next state =10
R=0, S=0 0 0 1 1 & a & b Q' Q R S Present state Output next state Q = 1 Q'= 1
R-S NAND Latch ■ Analysis Q 口R=1,S=1Q=(SQ)y=Q Qn+=(RQ'=Q 口R=1,S=0Qm+=1 Q n+1 R 口R=0,5=1Qm1=0 Qm1=1 Q 口R=0,S=0Qm=1 Q+1=1
• R -S NAND Latch ◼ Analysis R=1, S=1 Qn+1=(SQ’)’=Q; Qn+1’=(RQ)’=Q’; R=1, S=0 Qn+1=1; Qn+1’=0; R=0, S=1 Qn+1=0; Qn+1’=1; R=0, S=0 Qn+1=1; Qn+1’=1; R S Q’ Q RS Q’ Q