# logic circuit

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Related to logic circuit: Boolean algebra

## logic circuit,

electric circuit whose output depends upon the input in a way that can be expressed as a function in symbolic logic**symbolic logic**

or

**mathematical logic,**

formalized system of deductive logic, employing abstract symbols for the various aspects of natural language. Symbolic logic draws on the concepts and techniques of mathematics, notably set theory, and in turn has contributed to

**.....**Click the link for more information. ; it has one or more binary inputs (capable of assuming either of two states, e.g., "on" or "off") and a single binary output. Logic circuits that perform particular functions are called gates. Basic logic circuits include the AND gate, the OR gate, and the NOT gate, which perform the logical functions AND, OR, and NOT. Logic circuits can be built from any binary electric or electronic devices, including switches

**switch,**

electrical device having two states: on, or closed; and off, or open. Ideally a switch offers a zero impedance to a current when it is closed, and it offers infinite impedance when open.

**.....**Click the link for more information. , relays

**relay,**

electromechanical switch operated by a flow of electricity in one circuit and controlling the flow of electricity in another circuit. A relay consists basically of an electromagnet with a soft iron bar, called an armature, held close to it.

**.....**Click the link for more information. , electron tubes

**electron tube,**

device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum tube) or by an ionized gas at low pressure (in a gas tube).

**.....**Click the link for more information. , solid-state diodes

**diode**

, two-terminal electronic device that permits current flow predominantly in only one direction. Most diodes are semiconductor devices; diode electron tubes are now used only for a few specialized applications.

**.....**Click the link for more information. , and transistors

**transistor,**

three-terminal, solid-state electronic device used for amplification and switching. It is the solid-state analog to the triode electron tube; the transistor has replaced the electron tube for virtually all common applications.

**.....**Click the link for more information. ; the choice depends upon the application and design requirements. Modern technology has produced integrated logic circuits, modules that perform complex logical functions. A major use of logic circuits is in electronic digital computers. Fluid logic circuits have been developed whose function depends on the flow of a liquid or gas rather than on an electric current.

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## logic circuit

[′läj·ik ‚sər·kət] (computer science)

A computer circuit that provides the action of a logic function or logic operation. Also known as logic gate.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## logic circuit

An electronic circuit that performs some type of processing or controlling function. See logic chip.Copyright © 1981-2019 by

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