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GATE | GATE CS 2010 | Question 65

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In the sequential circuit shown below,if the initial value of the output Q1Q0 is 00,what are the next four values of Q1Q0? \"CSE_201032\"


11, 10, 01, 00


10, 11, 01, 00


10, 00, 01, 11


11, 10, 00, 01

Answer: (A)


We have t flip flop Truth table of t flip flop  

t q
0 q
1 q’

So q0 always inverted as t=1 always So 1)q10=1 2)q0 =0 3)q0 =1 4)q0 =1 For q1 also t=1 always but clock is so we have to observe positive edge of clock I.e. when is q0 going from 0 -> 1 1)q1 =1 2)q1 =1 3)q1 =0 4)q1 =0 So final combination q0q1->(11,10,01,00) Ans (A)

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Last Updated : 19 Nov, 2018
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