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 •
Circuit (neural network), a computational subgraph within an artificial neural network that performs a specific, interpretable function
Other sciences •
Neural circuit, 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==