feedback circuit
Noun
Meaning
a circuit that feeds back some of the output to the input of a system
Source: WordNetSynonyms
Hypernyms
Hyponyms
Examples
An electronic feedback circuit is usually used to adaptively synchronize the primary oscillator to the growing resonance in the secondary, and this is the only tuning consideration beyond the initial choice of a reasonable top-load.
This, in turn, would increase the cirrus cloud cover, effectively creating a positive feedback circuit.