Conversion of S-R Flip-Flop into D Flip-Flop

Last Updated : 4 Mar, 2025

Prerequisite -

Flip-flop

1. S-R Flip-Flop :

S-R flip-flop is similar to S-R latch expect clock signal and two AND gates. The circuit responds to the positive edge of clock pulse to the inputs S and R.

2. D Flip-Flop :

D Flip-Flop is a modified SR flip-flop which has an additional inverter. It prevents the inputs from becoming the same value.

Conversion of S-R Flip-Flop into D Flip-Flop :

  • Step-1: We construct the characteristic table of D flip-flop and excitation table of S-R flip-flop.
sr-to-d
Excitation Table
  • Step-2: Using the K-map we find the Boolean expression of S and R in terms of D.
    S = D
    R = D'
K-map
K-map
  • Step-3: We construct the circuit diagram of the conversion of S-R flip-flop into D flip-flop.
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Article Tags:
GATE CS
Digital Logic

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