Logic Gate ese electronic circuit hote hai jiske upper poori digital electronic bni hai. Bina logic gate ke koi bhi Digital system (आटोमेटिक सिस्टम ) nhi bnaya ja skta hai. Iss post mai Logic gate ki working, Logic symbol, Types of logic gate, Truth table etc. ke bare mai diya hai.
Definition:- Vah electronic circuit jo digital system (Computer, Memory, smart electronics devices) ke ese part hote hai jo 1 ya 1 se adhik input data lete hai or inputs ke base par 1 nya output data generate kate hai Logic Gates kahlate hai.
General Logic Gate ko Transistor and Diode ki help se bnaya jata hai.
Ex-- Simple language mai kho to jab ham Phone se picture lete hai to vah digital form (0, 1) mai memory mai save ho jati hai, or memory bhut sare logic gates ke combination se bnayi jati hai.
TYPES OF MAIN LOGIC GATES:
- AND Gate
- OR Gate
- NOT Gate
- NAND Gate
- NOR Gate
AND gate:
AND gate logical multiplication ke base mai work krta hai. Mean agar iske input mai koi bhi data 0 hota hai to output hmesa 0 hota hai.
Boolean Expression (Output): Y = A.B
TRUTH TABLE: 2 input AND gate ka truth table niche diya hoa he jisme A aur B input he or Y output hai.
| Input A |
Input B |
Output Y |
| 0 |
0 |
0 |
| 0 |
1 |
0 |
| 1 |
0 |
0 |
| 1 |
1 |
1 |
Note - Yha Logic gates ke symbol diye gye hai. Ek actual gate ka circuit electronic components ke use se bnaye jate hai jo ki bhut logo ko pta nhi hota, Gates ka actual electronic circuit and use dusri post mai diya gya hai.
OR Gate: OR gate logical Addition ke base mai work krta hai. Mean agar iske input mai koi bhi data 1 hota hai to output hmesa 1hota hai.
Boolean Expression: Y = A + B
TRUTH TABLE: 2 input OR gate ka truth table niche diya hoa he jisme A aur B input he or Y output hai.
| Input A |
Input B |
Output Y |
| 0 |
0 |
0 |
| 0 |
1 |
1 |
| 1 |
0 |
1 |
| 1 |
1 |
1 |
NOT Gate or Inverter:
The NOT gate or Inverter wo logic gate hota jisme ek input(A) aur ek output(Y) hota. NOT Gate 1 ko 0 mai & 0 ko 1 mai convert karta hai.
Boolean Expression: Y = Ā
TRUTH TABLE: NOT gate ka truth table niche diya gya hai, jisme A he or Y output hai.
NAND Gate:
NAND gate ko AND gate & NOT gate ko add krke bnaya jata hai. Mean jab AND ke aage NOT ko add kar diya jata hai.
Koi bhi input 0 hone par Output hmesa 1 hota hai.
NAND gate ko universal gate bhi kaha jata hai. kyuki keval isi gate ki help se hum koi bhi gate ko bna sakte he jese AND, OR aur NOT gate.
Boolean Expression: Y = A.B
TRUTH TABLE: 2 input OR gate ka truth table niche diya hoa he jisme A aur B input he or Y output hai.
| Input A |
Input B |
Output Y |
| 0 |
0 |
1 |
| 0 |
1 |
1 |
| 1 |
0 |
1 |
| 1 |
1 |
0 |
NOR gate:
NOR gate, OR gate & NOT gate ko add krke bnaya jata hai. Iska output tbhi high (1) hota hai jab sare input low (0) hoge
NOR gate bhi ek universal gate kuki iski help se AND, OR, NOT gate ko bnaya ja skta hai.
Boolean Expression: Y = A+B
TRUTH TABLE: 2 input OR gate ka truth table niche diya hoa he jisme A aur B input he or Y output hai.
| Input A |
Input B |
Output Y |
| 0 |
0 |
1 |
| 0 |
1 |
0 |
| 1 |
0 |
0 |
| 1 |
1 |
0 |
Boolean expression mai hmrsa - 1.1 = 1, 1+1 = 1, 1.0 = 0, 0.1 = 0 & 1+0 = 1 hota hai.
Truth table mai number of possible condition 2n
hoti hai. Yha 'n' number of input lines ko show krta hai.
So 2 input A, B ke liye number of condition = 22
= 4 hai.
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