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GATE CSE 1990 | Question: 3-i

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Choose the correct alternatives (More than one may be correct).

Two NAND gates having open collector outputs are tied together as shown in below figure.

The logic function $Y,$ implemented by the circuit is,

  1. $Y=ABC + DE$
  2. $Y=\overline{ABC + DE}$
  3. $Y=ABC.DE$
  4. $Y=\overline{ABC.DE}$
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5 Answers

1 votes
1 votes
I think it is a or operation so A and b I think because  if we assume three wires are connected in y tri  joint now if any of the wire is having the current it will come to down wire also na sooo why and operation
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