Current

Current is often used to transmit signals in noisy environments because it is much less affected by environmental noise pick-up. Before analogue to digital conversion the current signals are usually turned into voltage signals by a current-sensing resistor.

See also: Alternating Current, Ampere, Current Density, Current Rating, Current Regulator, Current Sink, Current Source, Eddy Currents, Leakage Current, Peak Current, Quiescent Current.