Closed loop
Closed loop may refer to:
- A feedback loop, often found in:
- Closed-loop transfer function, where a closed-loop controller may be used
- Electronic feedback loops in electronic circuits
- PID controller, a commonly used closed-loop controller
- Closed ecological system not relying on matter exchange outside of the system, as opposed to open loop
- Ecological sanitation systems or ecosan, intended to close the nutrient and water cycle
- Pulling water from one area of a reef aquarium and pumping it immediately elsewhere in the tank to create higher flow and minimize dead spots
- Circular economy, one in which materials are consistently reused rather than discharged as waste
- Closed time loop, or predestination paradox, a paradox of time travel that is often used as a convention in science fiction
- Closed curve, a mathematical curve described as a set of continuous parametric equations over a closed interval of real numbers for which the start point equals the end point
- Closed loop contest, a business development term at the company FanDuel meaning 'private contest'
- Knot loop
See also
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