What is the difference between a D latch and a D flip-flop? (a) A latch allows i

Question

What is the difference between a D latch and a D flip-flop?

(a) A latch allows input to flow through D to the output Q at the clock edge and a flip-flop allows input D to flow through to the output Q when the clock is high.

(b) A latch allows input to flow through D to the output Q when the clock is high and a flip-flop allows input D to flow through to the output Q at the clock edge.

(c) There is no difference between a latch and a flip-flop. They both accomplish the same purpose with different circuits.

(d) A latch “latches” the output to the intended value and a flip-flop “flip-flops” the output to the opposite value.

Explanation / Answer

Ans) ----B.A latch allows input to flow through D to the output Q when the clock is high and a flip-flop allows input D to flow through to the output Q at the clock edge

Reason) The difference between a latch and a flip-flop is that a latch is asynchronous, and the outputs can change as soon as the inputs do (or at least after a small propagation delay) when it is enabled i.e when clock is high. A flip-flop, on the other hand, is edge-triggered and only changes state when a control signal goes from high to low or low to high

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