AND GATE In an electronic computer, a gate circuit with more than one control signal (input) terminal. No output signal will be produced unless a pulse is applied to all inputs simultaneously.
BINARY There are two digits (1 and 0) in the binary system instead of 10 in the decimal system. Represented in a computer circuit by the presence of current (equivalent to 1). All computer programs are executed in binary form.
BOOLEAN ALGEBRA A system of mathematical logic dealing with classes, propositions, on-off circuit elements, etc. associated by operators as AND, OR NOT, EXEPT, IF..THEN, etc. thereby permitting computations in any mathematical system. Algebraic rules for manipulating logic equations.
CURRENT The movement of electrons through a conductor.
GATE A circuit having two or more inputs and one output. The output depending upon the combination of logic signals as the inputs. There are four gates called AND, OR, NAND, and NOR. In computer work a gate is often called an AND circuit.
LOGIC CIRCUIT A circuit (usually electronic) that provides an input-output relationship corresponding to a Boolean-algebra logic function.
LOGIC DIAGRAM A pictorial representation of interconnected logic elements using standard symols to represent the detailed functioning of electronic logic circuits.
LOGIC FUNCTION One of the Boolean-algebra functions AND, OR, and NOT or a combination of these.
NAND GATE A comination of a NOT function and an AND function in a binary circuit that has two or more inputs and one output. The output is logic 0 only if all inputs are logic 1; it is logic 1 if any input is logic 0.
NOR A function of P and Q that is true if both P and Q are false.
NOR GATE An OR gate followed by an inverter to form a binary circuit in which the output is logic 0 if any of the inputs is logic 1 and is logic 1 only if all the inputs are logic 0.
NOT (INVERTER) A circuit which takes in a positive signal and puts out a negative one or vice versa. The NOT is sometimes called an INVERTER circuit. A device or circuit that complements a Boolean function.
OR GATE Also called OR circuit, A gate that performs the function of logic "inclusive". It produces an output whenever anyone (or more) inputs is energized.
TRUTH TABLE A matrix which describes a logic function by listing all possible combinations of inputs, and by indicating the outputs for each combination. A listing which represents all possible input and output states of a logic function.
STATE The condition of a circuit system, etc. The condition at the output of a circuit that represents logic zero (0) or logic one (1). |
