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Logic gates are the fundamental building blocks of digital circuits and systems. They perform logical operations on one or more binary inputs to produce a single binary output. Here, we will discuss the symbols and functions of the basic logic gates.
Basic Logic Gates
AND Gate
Symbol: ____ A--| | |AND |-- Y B--|____|
Function: The AND gate outputs 1 only if all its inputs are 1.
Boolean Expression: ( Y = A \cdot B )
Truth Table: A | B | Y --|---|-- 0 | 0 | 0 0 | 1 | 0 1 | 0 | 0 1 | 1 | 1
OR Gate
Symbol: ____ A--| | | OR |-- Y B--|____|
Function: The OR gate outputs 1 if at least one of its inputs is 1.
Boolean Expression: ( Y = A + B )
Truth Table: A | B | Y --|---|-- 0 | 0 | 0 0 | 1 | 1 1 | 0 | 1 1 | 1 | 1
NOT Gate
Symbol: ____ A--| | |NOT |-- Y |____|
Function: The NOT gate inverts its input.
Boolean Expression: ( Y = \overline{A} )
Truth Table: A | Y --|-- 0 | 1 1 | 0
Universal Logic Gates
NAND Gate
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A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. See more
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AND Gate An AND gate has a single output and two or more inputs. When all of the inputs are 1, the output of this gate is 1. The AND gate’s Boolean logic is Y=A.B if there are two inputs A and B. Therefore, in And gate, the output is high when all the inputs are high. OR … See more
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Below, I’ve listed the main digital electronics components along with their symbols and uses. Logic gates are the building blocks of digital electronics. They process one or more input signals to produce an output based on logical operations. …
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