0 votes 0 votes Digital Logic sequential digital-logic + – Payal Rastogi asked Jan 29, 2016 Payal Rastogi 949 views answer comment Share Follow See all 6 Comments See all 6 6 Comments reply Praveen Saini commented Jan 29, 2016 reply Follow Share should be S3 1 votes 1 votes resilientknight commented Apr 2, 2016 reply Follow Share sir what do the question mean by what will be the state? does it mean what wil be the initial starting state provided after 1024 pulses i reach state 4? 0 votes 0 votes Praveen Saini commented Apr 2, 2016 reply Follow Share ABC = 000 means S0, 001 means S1 ......111 means S7. initial state is ABC = 100, where it will reach after 1024 clock pulses. 0 votes 0 votes Murali commented Apr 13, 2016 reply Follow Share sir can you please explain the answer 0 votes 0 votes Praveen Saini commented Apr 13, 2016 reply Follow Share Characterstic Equation of JK flip-flop, $Q^+ = JQ'+K'Q$ $J_a=1,\;K_a=Q_b',\;Q_a^+=1.Q_a'+Q_bQ_a=Q_a'+Q_b$ $J_b=Q_c,\;K_b=1,\;Q_b^+=Q_c.Q_b'+0.Q_b=Q_c.Q_b'$ $J_c=1,\;K_c=Q_a',\;Q_c^+=1.Q_c'+Q_aQ_c=Q_c'+Q_a$ initial state is $S_4$ , means initially $Q_aQ_bQ_c$ is as 100 so sequential of states will be as Clock Pulse $Q_aQ_bQ_c$ initially $100$ CP$1$ $001$ CP$2$ $110$ CP$3$ $101$ CP$4$ $011$ CP$5$ $100$ So After $5$ clock pulses, we reach to initial states. $1024$mod$5 = 4$ , it means after $1020$ clock pulses we reach to initial state and after $4$ more clock pulse it will be at $011$ means $S_3$ 3 votes 3 votes Murali commented Apr 14, 2016 reply Follow Share Thank you sir 0 votes 0 votes Please log in or register to add a comment.