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, 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 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 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 Conductive trace, traces through which electric current can flow. It is a t ...

, 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 logic, sequential digital logic electrical network, circuit that does not use a global clock circuit or clock signal, signal generator to synchronize its components. Instea ...

, 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 (IC), also known as a microchip or simply chip, is a set of electronic circuits, consisting of various electronic components (such as transistors, resistors, and capacitors) and their interconnections. These components a ...

, 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 called printed wiring board (PWB), is a Lamination, laminated sandwich structure of electrical conduction, conductive and Insulator (electricity), insulating layers, each with a pattern of traces, planes ...

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

, 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 network, also called a neuronal network, is an interconnected population of neurons (typically containing multiple neural circuits). Biological neural networks are studied to understand the organization and functioning of nervous syst ...

, 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 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 (biology), cell are designed to perform logical functions mimicking those observed in electronic circuits. Typically, these circuits are ca ...

, 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 (film character), a character from the Indian film series ''Munna Bhai'' * Circuit, a 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 The ITF Women's World Tennis Tour, previously known as the ITF Women's Circuit, is a series of professional tennis tournaments run by the International Tennis Federation for female professional tennis players. History It serves as a developmenta ...

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