﻿ Drive XOR gate from NOR gate, NOR to XOR conversion, Exculsive OR truth table and circuit. Interview question.
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NAND to INVERTER XOR from NAND XOR from NOR XOR from NOR/NAND
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XOR Truth Table:-

A B Y
0 0 0
0 1 1
1 0 1
1 1 0

XOR equation = A’B + AB’
NOR Truth Table

A B Y
0 0 1
0 1 0
1 0 0
1 1 0

NOR equation = A’ B’
Digital logic gate conversion related interview questions. Lets sta1rt our discussion with conversion for xor from nor gate only. The truth tables of XOR and NOR gates are below.
Check the circuit for NOR to inverter (equivalent of NAND to inverter). So the complete circuit for XOR using NOR gates is shown below. Diagram shown below.
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Reformat XOR equation by following steps below:
XOR is also know as Exclusive OR.
Step 1 :- A'B + AB' +AA’ + BB’ = [(A’+B') (A+B)] using postulate P4 and theorems T7, T8 and T9
Step 2 :- [(AB)'(A’B’)’] using theorems T7, T8 and T9
In step 2, we do invert of A and invert of B.
Derive XOR by only using NOR gates. Steps below.
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