Circuit may refer to:

Science and technology

Electrical engineering

Electrical circuit An electrical network is an interconnection of electrical components (e.g., battery (electricity), batteries, resistors, inductors, capacitors, switches, transistors) or a model of such an interconnection, consisting of electrical elements (e. ...

, a complete electrical network with a closed-loop giving a return path for current **

Analog circuit Analogue electronics () are electronic systems with a continuously variable signal, in contrast to digital electronics where signals usually take only two levels. The term ''analogue'' describes the proportional relationship between a signal ...

, uses continuous signal levels **

Balanced circuit In electrical engineering, a balanced circuit is electronic circuitry for use with a balanced line, or the balanced line itself. Balanced lines are a common method of Signal transmission, transmitting many types of electrical Signal (electronics ...

, paths are impedance-matched **

Circuit analysis In electrical engineering and electronics, a '' network'' is a collection of interconnected components. Network analysis is the process of finding the voltages across, and the currents through, all network components. There are many techniques ...

, the process of finding the voltages across, and the currents through, every component in an electrical circuit **

Circuit diagram A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an Electrical network, electrical circuit. A pictorial circuit diagram uses simple images of components, whil ...

, a graphical representation of an electrical circuit ** Digital circuit, uses discrete signal levels ** Electronic circuit, 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, 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, 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, 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), a closed path, with no other repeated vertices than the starting and ending vertices * Circuit of a matroid

Other sciences

* Biological neural network, 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), ''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 (film character), a character from the Indian film series ''Munna Bhai'' * Circuit, a List of Power Rangers Time Force characters#Circuit, character from ''Power Rangers Time Force'' * ''Circuitt'', a 2023 Indian Marathi-language action thriller film starring Vaibhav Tatwawadi and Hruta Durgule in lead roles.

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 * Circuit party, a gay dance event