A device or circuit that requires an electrical power supply to operate. An example is a locomotive decoder
Found on
http://www.dccsupplies.com/glossary.htm
Any electronic signal processing device that requires AC or DC current to power its operation, and that generally includes an amplifying stage after its primary processing circuit, allowing the output level to be matched to the input level. (WW)
Found on
http://www.encyclo.co.uk/local/22286
A component that has gain or operates in a non-linear fashion to change the basic character of an electric signal by, for example, amplification or rectification, or a device comprised of such component, for example a transistor switch. A device whose output is dependent upon an external source of power other than the input signal. See also: Active...
Found on
https://www.encyclo.co.uk/local/20687
No exact match found.
