Circuit may refer to:

Science and technology

Electrical engineering

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 sour ...

, 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 mathematica ...

, 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 electri ...

, contains "active" (nonlinear) electronic components capable of performing amplification, computation, and data transfer ***

Asynchronous circuit Asynchronous circuit (clockless or self-timed circuit) is a sequential digital logic circuit that does not use a global clock circuit or signal generator to synchronize its components. Instead, the components are driven by a handshaking circui ...

, or self-timed circuit, a sequential digital logic circuit that is not governed by a clock circuit or global clock signal *** Integrated circuit, a set of electronic circuits on a small "chip" of semiconductor material **** Mixed-signal integrated circuit, contains both analog and digital signals ***

Synchronous circuit In digital electronics, a synchronous circuit is a digital circuit in which the changes in the state of memory elements are synchronized by a clock signal. In a sequential digital logic circuit, data are stored in memory devices called flip-fl ...

, 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 and electronic engineering to connect electronic components to one another in a controlled manner. It takes the form of a laminated sandwich str ...

, on which electronic components are supported and connected using copper tracks on a non-conductive substrate ** Series and parallel circuits, two ways in which electrical components may be interconnected ** Simple filters, including: *** LC circuit or tank circuit, consisting of an inductance and a capacitance ***

RC circuit A resistor–capacitor circuit (RC circuit), or RC filter or RC network, is an electric circuit composed of resistors and capacitors. It may be driven by a voltage or current source and these will produce different responses. A first order RC ...

, 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 A telecommunication circuit is a path in a telecommunications network used to transmit information. Circuits have evolved over time from generally being built on physical connections between individual hardware cables, as in an analog phone swi ...

, 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 wit ...

, a closed path, with no other repeated vertices than the starting and ending vertices * Circuit of a matroid

Other sciences

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 t ...

, in neuroscience * Hydraulic circuit, in fluid mechanics * Magnetic circuit, in physics, one or more closed loop paths containing a magnetic flux * Monetary circuit theory, a heterodox theory of monetary economics, also called ''circuitism'' * Pneumatic circuit, in fluid mechanics * Synthetic biological circuit, 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) A circuit ( or ) was a historical political division of China and is a historical and modern administrative unit in Japan. The primary level of administrative division of Korea under the Joseon and in modern North and South Korea employs the ...

, 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 The International Tennis Federation (ITF) is the governing body of world tennis, wheelchair tennis, and beach tennis. It was founded in 1913 as the International Lawn Tennis Federation by twelve national tennis associations. As of 2016, there ...

** 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 A race track (racetrack, racing track or racing circuit) is a facility built for racing of vehicles, athletes, or animals (e.g. horse racing or greyhound racing). A race track also may feature grandstands or concourses. Race tracks are also ...

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 circuit party is a large Dance party, dance event. It extends through the night and into the following day, almost always with a number of affiliated events in the days leading up to and following the main event. Proto-circuit parties in the l ...

, a gay dance event