Basic Logic Gates in Digital Circuits
Explore the fundamentals of logic gates in digital circuits, including AND, OR, and NOT gates. Learn their properties, truth tables, and logic symbols in this informative presentation prepared by Dr. Saurav Samanta from Bajkul Milani Mahavidyalaya.
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Presentation Transcript
Presentation On Logic Gate Prepared By .. Dr. Saurav Samanta Dept. Of Physics Bajkul Milani Mahavidyalaya
Deffination : Logic gates are the digital circuits capable of performing a particular logic function by operating on a number of binary inputs. OR Logic gates are the basic building blocks of any digital circuit. Types of Logic Gates- Logic gates can be broadly classified as-
Basic Logic Gates: - Basic Logic Gates are the fundamental logic gates using which universal logic gates and other logic gates are constructed. Properties of Basic Logic Gates- Basic logic gates are associative in nature. Basic logic gates are commutative in nature. There are following three basic logic gates- 1.AND Gate 2.OR Gate 3.NOT Gate
1. AND Gate- The output of AND gate is high ( 1 ) if all of its inputs are high ( 1 ). The output of AND gate is low ( 0 ) if anyone of its inputs is low ( 0 ). Logic Symbol- The logic symbol for AND Gate is as shown below- Truth Table- The truth table for AND Gate is as shown below- Input Output A B 0 0 0 1 1 0 1 1 Y=A.B 0 0 0 1
2. OR Gate- The output of OR gate is high ( 1 ) if any one of its inputs is high ( 1 ). The output of OR gate is low ( 0 ) if all of its inputs are low ( 0 ). Logic Symbol- The logic symbol for OR Gate is as shown below- Truth Table- The truth table for OR Gate is as shown below- Input A B 0 0 0 1 1 0 1 1 Output Y=A+B 0 1 1 1
3. NOT Gate- The output of NOT gate is high ( 1 ) if itsinput is low ( 0 ). The output of NOT gate is low ( 0 ) if its input is high ( 1 ). From here- It is clear that NOT gate simply inverts the given input. Since NOT gate simply inverts the given input, therefore it is also known as Inverter Gate. Logic Symbol- The logic symbol for NOT Gate is as shown below- Truth Table- The truth table for NOT Gate is as shown below- Input Output A Y=A 0 1 1 0
