
In electronics, a constant current system is a system that can vary the voltage across an electronic circuit to maintain a constant electric current. When a component is indicated to be driven by a constant current, the driver circuit is, in essence, a current regulator and must appear to the component as a current source of suitable reliability. ...
Found on
http://en.wikipedia.org/wiki/Constant_current

A power supply that regulates output current level regardless of changes in load resistance
Found on
https://www.encyclo.co.uk/local/20757
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