Convert SR flip flop to D flip flop.

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written 4.0 years ago by

phenjoisilab • 0

Required flip flop : D flip flop

Given flip flop : SR flip flop.

Step 1: Excitation table for S - R flip flop.

$Q_n$	$\rightarrow$	$Q_n + 1$	S	R
0	$\rightarrow$	0	0	X
0	$\rightarrow$	1	1	0
1	$\rightarrow$	0	0	1
1	$\rightarrow$	1	X	0

Step: 2 Preparing characteristic table ff i/ps.

D	$Q_n$	$Q_n +1$	S	R
0	0	0	0	X
0	1	0	0	1
1	0	1	1	0
1	1	1	X	0

Step 3: Preparing comb-national ckt to drive i/ps 'S' and 'R'

For 's'

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For 'R'

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Step 4: D - Flip flop using S - R flip flop.

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