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

Famous quotes containing the word closed:

    “Had I made capital on my prettiness, I should have closed the doors of public employment to women for many a year, by the very means which now makes them weak, underpaid competitors in the great workshop of the world.”
    —Jane Grey Swisshelm (1815–1884)