A D flip-flop utilizing a PGT clock is in the CLEAR state. Which of the following input actions will cause it to change states?(a) CLK = NGT, D = 0(b) CLK = PGT, D = 0(c) CLOCK NGT, D = 1(d) CLOCK PGT, D = 1This question was posed to me in exam.I want to ask this question from D Flip Flop in division Flip-Flops of Digital Circuits

A D flip-flop utilizing a PGT clock is in the CLEAR state. Which of th

1.	A D flip-flop utilizing a PGT clock is in the CLEAR state. Which of the following input actions will cause it to change states?(a) CLK = NGT, D = 0(b) CLK = PGT, D = 0(c) CLOCK NGT, D = 1(d) CLOCK PGT, D = 1This question was posed to me in exam.I want to ask this question from D Flip Flop in division Flip-Flops of Digital Circuits
Answer» RIGHT answer is (d) CLOCK PGT, D = 1 The best explanation: PGT refers to Positive Going Transition and NGT refers to negative Going Transition. Earlier, the DFF is in a clear STATE (output is 0). So, if D = 1 then in the next stage output will be 1 and HENCE the stage will be changed.

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