
1) Communication circuit
Found on
https://www.crosswordclues.com/clue/current-loop

In electrical signalling an analog current loop is used where a device must be monitored or controlled remotely over a pair of conductors. Only one current level can be present at any time. Given its analog nature, current loops are easier to understand and debug than more complicated digital fieldbuses, requiring only a handheld digital multimete...
Found on
http://en.wikipedia.org/wiki/Current_loop

A generic term used to describe that part of the drive circuitry which integrates the error between current demand and feedback and eventually produces firing phase angle demand. The 'innermost' loop in a simple drive system.
Found on
http://www.encyclo.co.uk/local/20823
No exact match found.