![]() ![]() It is most common to regard subsequent inputs as being applied through a cascade of binary exclusive-or operations: the first two signals are fed into an XOR gate, then the output of that gate is fed into a second XOR gate together with the third signal, and so on for any remaining signals. However, it is rarely implemented this way in practice. If a logic gate were to accept three or more inputs and produce a true output if exactly one of those inputs were true, then it would in effect be a one-hot detector (and indeed this is the case for only two inputs). Literal interpretation of the name "exclusive or", or observation of the IEC rectangular symbol, raises the question of correct behaviour with additional inputs. Standard chip packages Philips 4070 quad dual input XOR chip on printed circuit board For the NOR constructions, the lower arrangement offers the advantage of a shorter propagation delay (the time delay between an input changing and the output changing). ![]() An XOR gate implements an exclusive or ( ↮, noting from de Morgan's Law that a NAND gate is an inverted-input OR gate.įor the NAND constructions, the upper arrangement requires fewer gates. XOR gate (sometimes EOR, or EXOR and pronounced as Exclusive OR) is a digital logic gate that gives a true (1 or HIGH) output when the number of true inputs is odd. ![]() For other uses, see XOR (disambiguation). For XOR logical operation, see Exclusive or. This article is about XOR digital logic gate (e.g. ![]()
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