# Electronics and Communication Engineering - Digital Electronics - Discussion

25.

In a ripple counter,

 [A]. whenever a flip flop sets to 1, the next higher FF toggles [B]. whenever a flip flop sets to 0, the next higher FF remains unchanged [C]. whenever a flip flop sets to 1, the next higher FF faces race condition [D]. whenever a flip flop sets to 0, the next higher FF faces race condition

Explanation:

In a ripple counter the effect ripples through the counter.

 Varsha said: (Oct 7, 2014) Toggles means what?

 Sudhaa said: (Feb 23, 2015) Changing from one state to other.

 Teja said: (Aug 28, 2015) I hope the output toggles when the state changes from to 1 to 0. But I can't get the question?

 Amrita said: (Feb 5, 2017) @Varsha. Toggle means all input state 11.

 Varsha Singh said: (Oct 11, 2017) If counter is made up of JK FF then for input 11 output will Toggle (change from 0 to 1 or vice versa).

 Nidhi said: (Jul 23, 2018) Why not B? I think option B is also right.

 Dhanya said: (Jul 30, 2018) Both option A and B are correct I think.

 Dhanya said: (Jul 30, 2018) Actually the o/p of FF in ripple counter is toggles when there is a transition of either 0 to 1 or 1 to 0, depending on the clock is positive edge or negative edge triggered.

 Chaitanya Kulkarni said: (Feb 1, 2019) According to me, B is the right answer.

 Raaja Uday Kumar Reddy said: (Apr 10, 2019) Here, Both A and B conditions are correct.