Closed loop
Closed loop or closed-loop may refer to:
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Mathematics
Technology
- A closed feedback loop:
- Closed-loop transfer function
- Electronic feedback loop
- PID controller
- Closed ecological system
- Closed-loop communication
- Ecological sanitation systems or ecosan
Other uses
- Circular economy, with materials recycled
- Closed time loop, a paradox of time travel
- Knot loop, in a knot
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