The Gateway to Computer Science Excellence
First time here? Checkout the FAQ!
+3 votes

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. $Y=ABC + DE$
  3. $Y=ABC.DE$
  4. $Y=ABC.DE$
asked in Digital Logic by Boss (41.1k points) | 994 views
Option C and D are same.

3 Answers

+1 vote
Best answer

There should be bubbled connection b/w two gates 

$y=((ABC)' + (DE)' )'$


NOTE: open gate works as NOR gate.

answered by (147 points)
selected ago by
+2 votes

A Wired Connection can create both an AND gate and an OR gate , however it cannot implement a not gate .

but to know whether this intersection acts as AND gate or OR gate , we should know whether the intersection is at a HIGH or a LOW.

i think here they have assumed it to be at a HIGH , hence the answer will be Y=(ABC)' . (DE)' .

answered by Active (2.4k points)
0 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
answered by Active (1.9k points)

Related questions

Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true
50,122 questions
53,242 answers
70,480 users