Logic Gates(लॉजिक गेट्स )
o The logic gates are the
main structural part of a digital system.
o Logic Gates are a block
of hardware that produces signals of binary 1 or 0 when input logic
requirements are satisfied.
o Each gate has a distinct
graphic symbol, and its operation can be described by means of algebraic
expressions.
o The seven basic logic
gates includes: AND, OR, XOR, NOT, NAND, NOR, and XNOR.
o The relationship between
the input-output binary variables for each gate can be represented in tabular
form by a truth table.
o Each gate has one or two
binary input variables designated by A and B and one binary output variable
designated by x.
AND GATE:(एंड गेट )
The AND gate is an electronic circuit which gives a high output
only if all its inputs are high. The AND operation is represented by a dot (.)
sign.
The OR gate is an electronic circuit which gives a high output if
one or more of its inputs are high. The operation performed by an OR gate is
represented by a plus (+) sign.
NOT GATE:(नॉट गेट )
The NOT gate is an electronic circuit which produces an inverted
version of the input at its output. It is also known as an Inverter.
NAND GATE:(नैनेड गेट )
The NOT-AND (NAND) gate which is equal to an AND gate followed by
a NOT gate. The NAND gate gives a high output if any of the inputs are low. The
NAND gate is represented by a AND gate with a small circle on the output. The
small circle represents inversion.
NOR GATE:(नार गेट )
The NOT-OR (NOR) gate which is equal to an OR gate followed by a
NOT gate. The NOR gate gives a low output if any of the inputs are high. The
NOR gate is represented by an OR gate with a small circle on the output. The
small circle represents inversion.
Exclusive-OR/ XOR GATE:(एक्सक्लूसिव गेट )
The 'Exclusive-OR' gate is a circuit which will give a high output
if one of its inputs is high but not both of them. The XOR operation is
represented by an encircled plus sign.
EXCLUSIVE-NOR/Equivalence GATE:
The 'Exclusive-NOR' gate is a circuit that does the inverse
operation to the XOR gate. It will give a low output if one of its inputs is
high but not both of them. The small circle represents inversion.
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