Conversion-Flip-flops. pptx SR, JK, D, T

Conversion of flipflops

1. Convert SR flip-flop to T flip-flop Step -1 : Draw the excitation table of the SR flip-flop Step -2 : Draw the characteristic table of T-flip-flop Q(t) Q(t+1) S R X 1 1 1 1 1 1 X Q(t) T Q(t+1) 1 1 1 1 1 1

2. Step -3 : Combining above two table and find simplified expression for S and R inputs in terms of T and Q(t) Karnaugh map for S is Karnaugh map for R is Q(t) T Q(t+1) S R X 1 1 1 1 1 X 1 1 1 T’ T Q’(t) 1 Q(t) X S = T .Q ’(t ) T’ T Q’(t) X Q(t) 1 R = T.Q(t )

3. Step-4 : Draw the Circuit diagram S R Q Q’ T CLOCK

4. Convert JK flip-flop to D flip-flop Step -1 : Draw the excitation table of the JK flip-flop Step -2 : Draw the characteristic table of D-flip-flop Q(t) Q(t+1) J K X 1 1 X 1 X 1 1 1 X Q(t) D Q(t+1) 1 1 1 1 1 1

5. Step -3 : Combining above two table and find simplified expression for Jand K inputs in terms of D and Q(t) Karnaugh map for J is Karnaugh map for K is Q(t) D Q(t+1) J K X 1 1 1 X 1 X 1 1 1 1 X D’ D Q’(t) 1 Q(t) X X J = D D’ D Q’(t) X X Q(t) 1 K = D’

6. Step-4 : Draw the Circuit diagram J K Q Q’ D CLOCK