The small bubble given on the output of the NAND gate symbol indicates

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Electrical Engineering XYZ MCQs

The small bubble given on the output of the NAND gate symbol indicates:

  1. Output is inverted
  2. Open collector output
  3. Tristate
  4. None of the above

Correct answer: 1. Output is inverted

Explanation: The small bubble on the output of the NAND gate symbol indicates that the output is inverted. This is a standard notation in digital electronics. When a bubble (also called a “bubble” or “inversion dot”) is placed at the output of a gate symbol, it signifies that the logical state at the output is the opposite (complement) of what it would be without the bubble.

So, in the case of a NAND gate with a bubble on its output, it means that the output is the logical NOT of the regular output. If the regular output would be high, the output with the bubble is low, and vice versa.

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