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Circuit may refer to:


Science and technology


Electrical engineering

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Electrical circuit An electrical network is an interconnection of electrical components (e.g., batteries, resistors, inductors, capacitors, switches, transistors) or a model of such an interconnection, consisting of electrical elements (e.g., voltage sources, ...
, a complete electrical network with a closed-loop giving a return path for current ** Analog circuit, uses continuous signal levels ** Balanced circuit, paths are impedance-matched ** Circuit analysis, the process of finding the voltages across, and the currents through, every component in an electrical circuit ** Circuit diagram, a graphical representation of an electrical circuit **
Digital circuit In theoretical computer science, a circuit is a model of computation in which input values proceed through a sequence of gates, each of which computes a function. Circuits of this kind provide a generalization of Boolean circuits and a mathematical ...
, uses discrete signal levels **
Electronic circuit An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow. It is a type of electrical ...
, contains "active" (nonlinear) electronic components capable of performing amplification, computation, and data transfer *** Asynchronous circuit, or self-timed circuit, a sequential digital logic circuit that is not governed by a clock circuit or global clock signal ***
Integrated circuit An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material, usually silicon. Large numbers of tiny ...
, a set of electronic circuits on a small "chip" of semiconductor material **** Mixed-signal integrated circuit, contains both analog and digital signals *** Synchronous circuit, a digital circuit in which the changes in the state of memory elements are synchronized by a clock signal **
Printed circuit board A printed circuit board (PCB; also printed wiring board or PWB) is a medium used in Electrical engineering, electrical and electronic engineering to connect electronic components to one another in a controlled manner. It takes the form of a L ...
, on which electronic components are supported and connected using copper tracks on a non-conductive substrate **
Series and parallel circuits Two-terminal components and electrical networks can be connected in series or parallel. The resulting electrical network will have two terminals, and itself can participate in a series or parallel topology. Whether a two-terminal "object" is an ...
, two ways in which electrical components may be interconnected ** Simple filters, including: ***
LC circuit An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together. The circuit can ac ...
or tank circuit, consisting of an inductance and a capacitance *** RC circuit, comprises a resistance and a capacitance *** RL circuit, comprises a resistance and an inductance *** RLC circuit, comprises a resistance, an inductance, and a capacitance ** Telecommunication circuit, on which information is transmitted ** Nonlinear circuit, a circuit with nonlinear elements.


Mathematics and computer science

* Circuit (computer theory), a theoretical structure simulating electrical and data paths ** Boolean circuit, a mathematical model for digital logic circuits ** Integer circuit, a mathematical object of computational complexity * Circuit complexity, a branch of computational complexity theory *
Cycle (graph theory) In graph theory, a cycle in a graph is a non-empty trail in which only the first and last vertices are equal. A directed cycle in a directed graph is a non-empty directed trail in which only the first and last vertices are equal. A graph witho ...
, a closed path, with no other repeated vertices than the starting and ending vertices * Circuit of a matroid


Other sciences

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Biological neural network A neural circuit is a population of neurons interconnected by synapses to carry out a specific function when activated. Neural circuits interconnect to one another to form large scale brain networks. Biological neural networks have inspired the ...
, in neuroscience * Hydraulic circuit, in fluid mechanics *
Magnetic circuit A magnetic circuit is made up of one or more closed loop paths containing a magnetic flux. The flux is usually generated by permanent magnets or electromagnets and confined to the path by magnetic cores consisting of ferromagnetic materials l ...
, in physics, one or more closed loop paths containing a magnetic flux *
Monetary circuit theory Monetary circuit theory is a heterodox theory of monetary economics, particularly money creation, often associated with the post-Keynesian school. It holds that money is created endogenously by the banking sector, rather than exogenously by cent ...
, a heterodox theory of monetary economics, also called ''circuitism'' *
Pneumatic circuit A pneumatic circuit is an interconnected set of components that convert compressed gas (usually air) into mechanical work. In the normal sense of the term, the circuit must include a compressor or compressor-fed tank. Components The circuit compr ...
, in fluid mechanics *
Synthetic biological circuit Synthetic biological circuits are an application of synthetic biology where biological parts inside a cell are designed to perform logical functions mimicking those observed in electronic circuits. The applications range from simply inducing prod ...
, in synthetic biology


Arts, entertainment, and media

* ''Circuit'' (film), a 2001 gay-themed film set in the world of gay circuit parties * '' Mario Kart: Super Circuit'', a 2001 Game Boy Advance game and the third game in the ''Mario Kart'' series * "Circuit", a character from the '' Munna Bhai'' film series * Circuit, a character from ''Power Rangers Time Force''


Church

* Circuit (LCMS), a local grouping of congregations in the Lutheran Church–Missouri Synod * Methodist Circuit, a form of church governance in Methodism


Government and law

* Circuit (administrative division), an administrative country subdivision in East Asia * Circuit court, the name of court systems in several common law jurisdictions


Sports

* Circuit training, a form of high-intensity aerobics * ITF Pro Circuit, pro tennis tours of the International Tennis Federation ** ITF Men's Circuit ** ITF Women's Circuit


Transportation and racing

* Circuit (airfield), also called pattern, a standard path followed by aircraft when taking off or landing * Circuit, a race track or one complete traverse of a track ** Formula One circuits (see list of Formula One circuits) ** Kart circuit, a race track designed for kart racing


Other uses

* Circuit (software), a collaboration service software by Unify * Circuit, slang for hangouts or events frequented by a given
social circle In the social sciences, a social group can be defined as two or more people who interact with one another, share similar characteristics, and collectively have a sense of unity. Regardless, social groups come in a myriad of sizes and varietie ...
* Circuit party, a gay dance event


See also

* * * '' Circuital'', a 2011 album by My Morning Jacket * Cirkut * The Circuit (disambiguation) {{disambiguation