GATE EC 2019 Set 1 — Question 49
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Digital Circuits → Sequential Logic → FSM (Mealy & Moore)
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Question
The state transition diagram for the circuit shown is

Correct answer
(C) [figure]
Solution
Let the current state be . The next state is determined by the input of the flip-flop.
From the circuit:
.
So, for , regardless of the current state .
.
So, for , .
From the circuit:
1.The MUX output is:
- If , (input '0' selected)
- If , (input '1' selected)
.
So, for , regardless of the current state .
- If
- If
.
So, for , .
- If
- If
- From , both and lead to .
- From , leads to (self-loop) and leads to .
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