Sunday, 2 December 2012

All about D Flip Flop


By on 07:04

D Flip Flop:-'D' stands for Delay so it is also called as delay flip flop.It delay the input by a clock pulse.It can either be construct with clock or non clock.

Truth Table:-



DQ(n+1)Q(n+1)'Action
001Reset
110Set

PS-NS Table(or Present State-Next State):-



Q(n)DQ(n+1)Q(n+1)'Action
0001Reset
0110Set
1001Reset
1010Set




Excitation Table or Application Table:-


Q(n)Q(n+1)D
000
011
100
111


Characteristic Equation of D flip flop:-

Q(n+1)=Q(n)'D+Q(n)D

=D(Q(n)'+Q(n))
=D

Circuit Diagram of D flip flop using NAND gate:-






Circuit Diagram of D flip flop using NOR gate:-




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