Digital Electronics - Combinational Logic Analysis - Discussion
Discussion Forum : Combinational Logic Analysis - General Questions (Q.No. 16)
16.
A 4-variable AND-OR circuit produces a 0 at its Y output. Which combination of inputs is correct?
Discussion:
5 comments Page 1 of 1.
Dnyaneshwar Sahane said:
1 decade ago
A AND with B.
C AND with D.
Output of first AND gate AB is OR with output of second AND gate is CD.
So, output of OR gate is,
Y= AB+CD.
So, A=1, B=0, C=1, D=0.
AB=0, CD=0.
So Output Y=0.
Option D is the write Answer.
C AND with D.
Output of first AND gate AB is OR with output of second AND gate is CD.
So, output of OR gate is,
Y= AB+CD.
So, A=1, B=0, C=1, D=0.
AB=0, CD=0.
So Output Y=0.
Option D is the write Answer.
Glkslsl said:
1 decade ago
If we take ab and cd as 2 and gates and for a or gate to get a output as 0 the inputs should be 0,0 so for the combination of option D or gate gets the input as 0,0.
Raji oruganti said:
5 years ago
Ans)D is correct.
2 input variable AND gate A=1 B=0:
2 input variable AND gate C=1 D=0;
OR gate output of AB+CD=1*0+1*0=0.
2 input variable AND gate A=1 B=0:
2 input variable AND gate C=1 D=0;
OR gate output of AB+CD=1*0+1*0=0.
(2)
Muthulakshmi said:
9 years ago
I can split into A + BCD.
BCD = 0.
Its OR with A then the output is 1.
So option d is wrong.
BCD = 0.
Its OR with A then the output is 1.
So option d is wrong.
Sudheer said:
1 decade ago
What do you mean by 4 variable and or circuit and and-or inverter circuit?
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