closed loop

noun Computers, Electronics.
the complete path followed by a signal as it is fed back from the output of a circuit, device, or system to the input and then back to the output.
Compare feedback loop.
Dictionary.com Unabridged

closed-loop

[klohzd-loop]
adjective Engineering.
1.
of or pertaining to a processing system in which effluents are recycled, that is, treated and returned for reuse.
2.
of or pertaining to an automatic control system operating on a feedback principle. Compare feedback ( def 2 ).

Origin:
1950–55

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
She makes eye contact not with the viewer but with herself-watching herself
  watch herself, in an extended but closed loop.
It's the old marketing dream of synergy, turned into a closed loop of
  name-recognition feedback.
The weather is a closed loop, completed far above the surface by southerly
  winds.
Repeat after me: the banking system is a closed loop.
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