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प्रश्न
Give the truth table and circuit symbol for NAND gate
What is a NAND gate? Write its truth table.
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उत्तर १
The output is the inverted version of the output of AND gate. The symbol for NAND gate is given below
Truth table
| I | O | O/P |
| A | B | Y |
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
उत्तर २
NAND gate is the combination of AND gate and NOT gate i.e. NAND gate is nothing but it is AND gate with an inverted output.
The Logical statement of NAND gate is if input A is true and B is true then the output if false otherwise
true.
The Boolean equation of NAND gate is `Y = bar(A.B)`
| Input | Output | |
| A | B | `Y = bar(A.B)` |
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
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Useful Constants and Relations :
| 1. Speed of Light in Vacuum | (c) = 3.00 x 108 m/s |
| 2. Charge of a proton | (e) = 1.60 x 10-19C |
| 3. Planck's Constant | (h) = 6.6 x 10-34 Js |
| 4. Permeability of vacuum | (μ0) = 4π x 10-7 Hm-1 |
| 5. Electron Volt | (1eV ) = 1.6 x 10 |
| 6. Unified Atomic Mass Unit | (1u) = 931 MeV |
| (π) = 3.14 | |
| ( ln 2 ) = 0.693 |
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