Flip-Flop truth tables and excitation tables

Flip-Flop truth tables and excitation tables:

1      1)    R-S flip-flop: -The truth table and excitation tables of R-S flip are

Truth table of R-S filp-flop

Sn	Rn	Qn+1
0	0	Qn
0	1	0
1	0	1
1	1	?

Excitation table of R-S flip-flop

Present output	Next output	input
Qn	Qn+1	Sn	Rn
0	0	0	X
0	1	1	0
1	0	0	1
1	1	X	0

Note: - Here X is either 0 or 1.

2) J-K Flip-Flop: -  The truth tables and excitation of j-k flip flops are

Truth table

Jk	Kn	Qn+1
0	0	Qn
0	1	0
1	0	1
1	1	~Qn

Excitation table of j-k flip-flop

Present output	Next output	input
Qn	Qn+1	Jn	Kn
0	0	0	X
0	1	1	X
1	0	X	1
1	1	X	0

3) T Flip-flop:- Truth table and excitation table of T Flip-flop

                                               Truth table

Tn	Qn+1
0	Qn
1	~Qn

                                                Excitation table

present output Qn	Next output Qn+1	input Tn
0	0	0
0	1	1
1	0	1
1	1	0

4) D Flip-flop:- The truth table and excitation tables of D flip-flops are

                                      Truth table of D flip-flop

Dn	Qn+1
0	0
1	1

                                           

                                        Excitation table of D flip-flop

present output Qn	Next output Qn+1	input Tn
0	0	0
0	1	1
1	0	0
1	1	1

These are S-R, J-K, T, D flip flops truth tables and excite tables by using these tables we can convert from one to other like S-R to J-K etc.