Multiple choice

How many gates (minimum) are needed for a 3-bit up counter using standard binary and using T flip-flop?

Assume unlimited fan-in.

  1. 4

  2. 3

  3. 2

  4. 1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A 3-bit up counter using T flip-flops requires minimum gates when exploiting the toggle pattern. With unlimited fan-in, only 2 gates are needed: the first T flip-flop toggles every clock (no gate needed), while the second and third require enable logic that can be implemented with just 2 gates total using AND/OR combinations.

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