# logic circuit

Also found in: Dictionary, Thesaurus, Wikipedia.
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 logicsymbolic 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
; 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 switchesswitch,
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.
, relaysrelay,
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.
, electron tubeselectron 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).
, solid-state diodesdiode
, 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.
, and transistorstransistor,
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.
; 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.

## 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.

## logic circuit

An electronic circuit that performs some type of processing or controlling function. See logic chip.
References in periodicals archive ?
One example is the codification presented by [14] where the combinational logic circuits can be represented by a sum of products of the system logic variables (Fig.
The IBM team made a " voltage inverter " -- one of the three fundamental logic circuits that are the basis for all of today's computers -- from a carbon nanotube, a tube-shaped molecule of carbon atoms that is 100,000 times thinner than a human hair.
"What we've developed is a device that can be configured in a logic circuit that is capable of performing all the necessary Boolean logic and can be cascaded to develop sophisticated function units," said Bruce W.
For a combinational logic circuit, we first duplicate the whole circuit.
One common task in digital electronics consists of designing a combinational logic circuit (CLC) that performs a desired function, given a certain specified set of available logic gates [1].
The outputs of the control logic circuit are the UP and DOWN signals, which control the up/down counter in the offset cancellation block.
The switch plane is composed of NanoBridges that configure LSI interconnects and NanoBridges that configure the logic circuit. The logic plane features newly developed programmable logic from NEC that has the same functionality as conventional programmable logic even though it is smaller in size.
They can be programmed developing logic circuit diagram in software supplied by device manufacturer, or writing code in a Hardware Description Language.
Specific topics include: Boolean functions represented as cubes and tautology in combinational logic circuit design; counters; and VHDL coding for computer-aided synthesis of combinational logic circuits as well as sequential and fundamental mode non-synchronous sequential circuits, among other topics.
An asynchronous circuits are also called self-timed circuit, is a sequential digital logic circuit which is not ruled by a clock circuit or global clock signal.
In [10], complementary pass transistor adiabatic logic circuit was discussed, in which the nonadiabatic energy loss of output loads has been completely eliminated.

Site: Follow: Share:
Open / Close