Assertion (A): The indeterminate condition of the J-K flip-flop is per...
The truth table for S-ffand J-Kflip-flop are shown below.
It is clear from the above truth table that when S = R = 1, the output of S-R flip-flop is indeterminate. However, when J = K = 1, the output of J-Kflip-flop is
(not indeterminate). Therefore, the indeterminate condition of the S-R flip-flop is permitted in a J-Kflip-flop.
A J-Kflip-flop has a characteristic similar to that of an S-R flip-flop which is evident from the above truth tables.
Hence, assertion is false but reason is true.
View all questions of this test
Assertion (A): The indeterminate condition of the J-K flip-flop is per...
Assertion (A): The indeterminate condition of the J-K flip-flop is permitted in the S-R flip-flop.
Reason (R): A J-K flip-flop has a characteristic similar to that of an S-R flip-flop.
The correct answer is option 'D', which states that Assertion (A) is false but Reason (R) is true.
Explanation:
Understanding Flip-Flops:
- Flip-flops are sequential logic circuits that can store one bit of information.
- They are commonly used in digital systems for data storage, synchronization, and control.
- Different types of flip-flops include S-R flip-flop, J-K flip-flop, D flip-flop, and T flip-flop.
S-R Flip-Flop:
- The S-R flip-flop (Set-Reset flip-flop) is a basic type of flip-flop.
- It has two inputs: Set (S) and Reset (R).
- The S-R flip-flop has two stable states: Set (Q=1) and Reset (Q=0).
- The outputs Q and Q' are complementary to each other.
- When S=0 and R=0, the flip-flop remains in its current state.
- When S=1 and R=0, the flip-flop is set (Q=1).
- When S=0 and R=1, the flip-flop is reset (Q=0).
- When S=1 and R=1, the flip-flop enters an indeterminate state, where the outputs are unpredictable.
J-K Flip-Flop:
- The J-K flip-flop is an extension of the S-R flip-flop.
- It has two additional inputs: J (Jack) and K (King).
- The J-K flip-flop also has two stable states: Set (Q=1) and Reset (Q=0).
- The J-K flip-flop has the advantage of eliminating the indeterminate state of the S-R flip-flop.
- When J=0 and K=0, the flip-flop remains in its current state.
- When J=1 and K=0, the flip-flop is set (Q=1).
- When J=0 and K=1, the flip-flop is reset (Q=0).
- When J=1 and K=1, the flip-flop toggles its state (Q' = Q').
Difference between S-R Flip-Flop and J-K Flip-Flop:
- In an S-R flip-flop, when both inputs are set to 1, the outputs enter an indeterminate state.
- This means that the outputs can be unpredictable, leading to unreliable behavior.
- In a J-K flip-flop, when both inputs are set to 1, the flip-flop toggles its state.
- This eliminates the indeterminate state and ensures reliable behavior.
Conclusion:
- The indeterminate condition of the J-K flip-flop is not permitted in the S-R flip-flop.
- The J-K flip-flop has a characteristic (toggling) that is not present in the S-R flip-flop.
- Therefore, Assertion (A) is false but Reason (R) is true.
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).