XNOR Gate from NAND Gate
Implementation of XNOR Gate from NAND GateÂļ
āĻāĻŽāϰāĻž āĻāĻžāύāĻŋ, NAND Gate āĻšāϞ⧠āĻāĻāĻāĻŋ universal logic gate, āϝā§āĻāĻŋ āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰ⧠āϝā§āĻā§āύ⧠āϧāϰāύā§āϰ logic gate āϤā§āϰāĻŋ āĻāϰāĻž āϝāĻžā§āĨ¤ āĻāĻāύ āĻāĻŽāϰāĻž āĻā§āĻŦāϞ NAND gate āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰ⧠XNOR gate āĻŦāĻžāϏā§āϤāĻŦāĻžā§āύ āĻāϰāĻŦāĨ¤
What is a XNOR Gate?Âļ
XNOR (Exclusive-NOR) Gate āĻšāϞ⧠āĻāĻāĻāĻŋ derived logic gateāĨ¤ āĻāϰ āĻĻā§āĻāĻŋ āĻāύāĻĒā§āĻ āĻāĻŦāĻ āĻāĻāĻāĻŋ āĻāĻāĻāĻĒā§āĻ āĻĨāĻžāĻā§āĨ¤ XNOR gate āϤāĻāύāĻ HIGH (Logic 1) āĻāĻāĻāĻĒā§āĻ āĻĻā§ā§ āϝāĻāύ āĻĻā§āĻāĻŋ āĻāύāĻĒā§āĻ āϏāĻŽāĻžāύ āĻĨāĻžāĻā§ (āĻāĻā§āĻ 0 āĻ āĻĨāĻŦāĻž āĻāĻā§āĻ 1)āĨ¤ āĻāĻŋāύā§āϤ⧠āϝāĻāύ āĻĻā§āĻāĻŋ āĻāύāĻĒā§āĻ āĻāϞāĻžāĻĻāĻž āĻĨāĻžāĻā§, āϤāĻāύ āĻāĻāĻāĻĒā§āĻ LOW (Logic 0) āĻšā§āĨ¤
Output Equation of XNOR GateÂļ
Truth Table of XNOR GateÂļ
| A | B | Output ($Y = \overline{(A \oplus B)}$) |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
What is a NAND Gate?Âļ
NAND Gate āĻšāϞ⧠āĻāĻāĻāĻŋ universal logic gateāĨ¤ āĻāĻāĻŋ āĻŽā§āϞāϤ AND āĻāĻŦāĻ NOT gate-āĻāϰ āϏāĻŽāύā§āĻŦā§āĨ¤ NAND gate-āĻāϰ āĻāĻāĻāĻĒā§āĻ LOW āĻšā§ āϤāĻāύāĻ āϝāĻāύ āĻāϰ āϏāĻŦ āĻāύāĻĒā§āĻ HIGH āĻšā§, āĻŦāĻžāĻāĻŋ āϏāĻŦ āĻā§āώā§āϤā§āϰ⧠āĻāĻāĻāĻĒā§āĻ HIGH āĻĨāĻžāĻā§āĨ¤

Output Equation of NAND GateÂļ
Truth Table of NAND GateÂļ
| A | B | Output ($Y = \overline{(A \cdot B)}$) |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
Implementation of XNOR Gate from NAND GateÂļ

Figure-3-āĻ ā§ĢāĻāĻŋ NAND gate āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰ⧠āĻāĻāĻāĻŋ XNOR gate āĻāϰ āĻŦāĻžāϏā§āϤāĻŦāĻžā§āύ āĻĻā§āĻāĻžāύ⧠āĻšā§ā§āĻā§āĨ¤
āĻāĻāύ āϧāĻžāĻĒā§ āϧāĻžāĻĒā§ āĻĻā§āĻāĻŋ āĻā§āĻāĻžāĻŦā§ āĻāĻ āϏāĻžāϰā§āĻāĻŋāĻ āĻāĻžāĻ āĻāϰā§āĨ¤
āĻĒā§āϰāĻĨāĻŽ NAND gate-āĻāϰ āĻāĻāĻāĻĒā§āĻāĻ
āĻĻā§āĻŦāĻŋāϤā§ā§ NAND gate-āĻāϰ āĻāĻāĻāĻĒā§āĻāĻ
āϤā§āϤā§ā§ NAND gate-āĻāϰ āĻāĻāĻāĻĒā§āĻāĻ
āĻāϤā§āϰā§āĻĨ NAND gate-āĻāϰ āĻāĻāĻāĻĒā§āĻāĻ
āĻĒāĻā§āĻāĻŽ NAND gate-āĻ $Y_1$ āĻāĻŦāĻ $Y_4$ āĻĻāĻŋāϞ⧠āĻĒāĻžāĻā§āĻž āϝāĻžā§āĻ
āĻāĻāύ expand āĻāϰāϞā§:
â \(Y = AB + \overline{A}\,\overline{B}\)
â \(Y = \overline{(A \oplus B)}\)
IC Implementation of the XNOR using NAND:Âļ
Testing:Âļ
â āĻāĻāĻāĻžāĻŦā§ āĻļā§āϧā§āĻŽāĻžāϤā§āϰ NAND gate āĻŦā§āϝāĻŦāĻšāĻžāϰ āĻāϰā§āĻ āĻāĻāĻāĻŋ XNOR gate āϤā§āϰāĻŋ āĻāϰāĻž āϏāĻŽā§āĻāĻŦāĨ¤
āϏāĻāĻā§āώā§āĻĒā§ āĻŽāύ⧠āϰāĻžāĻā§āĻ
- A â B â XOR gate
- A â B â XNOR gate
āĻāϰ bar āĻĻāĻŋāϞ⧠â
\(\overline{A \oplus B}\) = \(A â B\)
āĻŽāĻžāύā§, XOR-āĻāϰ āĻāĻĒāϰ wholebar = XNORāĨ¤




