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In the circuit shown, what are the values of F for EN = 0 and EN = 1, respectively?

1. 0 and D
2. Hi-Z and D
3. 0 and 1
4. Hi-Z and D̄

Correct answer: Hi-Z and D

Solution

When EN = 0, the output F is in a high-impedance state (Hi-Z) because the enable signal is off, preventing any output. When EN = 1, the output F directly follows the input D, resulting in F being equal to D.

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