GATE Overflow | Digital Logic | Test 1 | Question: 16

Question

The output of a gated S-R flip-flop changes only if the:

• A. flip-flop is set
• B. control input data has changed
• C. flip-flop is reset
• D. input data has no change

Comments

which option is correct please explain why???

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The output of a gated S-R flip-flop changes only if control input data has changed.

which is option B 

https://en.wikipedia.org/wiki/Flip-flop_(electronics)#Gated_SR_latch

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@bikram sir if control is changing from 01 to 00
or 10 to 00 and vice versa than output doesnot change.

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In flip flop, we have control inputs as clock

for eg. if at clock =1 and S=0 and R = 0 , we have memory state in SR flip-flop and when clock changed to 0,we still have memory state.

So, our output of SR flip flop is same as memory state. outputs are not changed?explain pls

Answer 1

Clock signal means control input.

Output is changed when we give active clock signal.