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Flip-Flops and Timers

Q1: Which of the following describes the operation of a positive edge-triggered D-type flip-flop?

A If both inputs are HIGH, the output will toggle.

B The output will follow the input on the leading edge of the clock.

C When both inputs are LOW, an invalid state exists.

D The input is toggled into the flip-flop on the leading edge of the clock and is passed to the output on the trailing edge of the clock.

ANS:B - The output will follow the input on the leading edge of the clock.

In the D-flip flop the output will follow the input on the falling edge (also known as trailing edge) but not on the leading edge.



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