Digital Electronics - Flip-Flops - Discussion

I case of master-slave flip-flop master is enabled only when the clock is high.

@reena

Could you please explain me more about this.

Option B is correct since, basically master slave FF is used to solve the problem of "Race around condition. This FF consists of two circuits namely master and slave, and for master we will give clock directly (i. E High) and for slave we will give invert of clock (i. E Low) , and the output state will change only when the state of the slave changes (i. E the output state of the master -slave FF depend's only on the state of the slave) so that the option B is absolutely correct.

I doubt the question is not correctly asked. In the options it says "when the gate is HIGH". What should mean by gate is HIGH? The question will be clear if it says when clock is HIGH. : (.

In the question the type of FF should be mentioned (ie.,positive edge triggered or negative edge triggered) and I agree with @Manu M.

To avoid fast toggling of output state there should be a protective mechanism[slave] which is in hold state during the positive gate at the master.

Master enabled means that clock should be high.

The correct option will be when the clock is HIGH. It's not gate.

When a clock is high, the master is active and slave is inactive and.

When a clock is low, the slave is active and master is inactive.