Circuit

Circuit may refer to:

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 (film character), a character from the Indian film series Munna Bhai
 * 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
 * Circuit party, a gay dance event