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In digital electronics, a NAND gate (NOT-AND) is a logic gate which produces an output which is false only if all its inputs are true; thus its output is complement to that of an AND gate. A LOW (0) output results only if all the inputs to the gate are HIGH (1); if any input is LOW (0), a HIGH (1) output results.
A CMOS transistor NAND element. V dd denotes positive voltage.. In CMOS logic, if both of the A and B inputs are high, then both the NMOS transistors (bottom half of the diagram) will conduct, neither of the PMOS transistors (top half) will conduct, and a conductive path will be established between the output and Vss (ground), bringing the output low.
A NAND gate is equivalent to an OR gate with negated inputs, and a NOR gate is equivalent to an AND gate with negated inputs. This leads to an alternative set of symbols for basic gates that use the opposite core symbol (AND or OR) but with the inputs and outputs negated. Use of these alternative symbols can make logic circuit diagrams much ...
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English: A labelled MIL/ANSI symbol for an NAND gate. A and B are the inputs, Q is the output. Date: 16 January 2009: Source: Own work: Author: Inductiveload: SVG ...
IEC Symbol for a NAND Gate: Date: 2/06/06: Source: Own Drawing, made in Inkscape 0.43: Author: jjbeard: Permission (Reusing this file) PD: Licensing. Public domain ...
ANSI Symbol for an NAND Gate: Date: 2 June 2006: Source: Own Drawing, made in Inkscape 0.43: Author: jjbeard: ... Digital Circuits/NAND gate; Digital Circuits/NAND Logic;
OR-AND-invert gates or OAI-gates are logic gates comprising OR gates followed by a NAND gate. ... Symbol for an 2-1 OAI-gate. The OR gate has the inputs A and B.