In the sequential circuit shown below, if the initial value of the output…
2010
In the sequential circuit shown below, if the initial value of the output \(Q_1Q_0\) is 00, what are the next four values of \(Q_1Q_0\)?
- A.
11,10,01,00
- B.
10,11,01,00
- C.
10,00,01,11
- D.
11,10,00,01
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Show answer & explanation
Correct answer: A
Correct. The left T input is 1 so Q0 toggles every clock. The right flip-flop's T input is the complement of Q0, so Q1 toggles when Q0 (before the clock) is 0. Step-by-step from Q1Q0 = 00: Clock 1 -> 11; Clock 2 -> 10; Clock 3 -> 01; Clock 4 -> 00. Hence the next four values are 11, 10, 01, 00.