Circuit
Circuit may refer to:

Science and technology
Electrical engineering
Electrical circuit, 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, 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), 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

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

In 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

In 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

See also
All pages with titles beginning with Circuit
All pages with titles containing circuit
Circuital, a 2011 album by My Morning Jacket
Cirkut
The Circuit (disambiguation)