Analogue
Electronics systems having continuously variable signal refer to analogue electronics. Digital electronics signals take only two different levels, proportional relationship between a signal and a voltage or current that represent the signal that is being described by the term analogue.
analogue signal looks like on the oscilloscope
Analogue signal utilises some attribute of the medium to convey the signal’s information in such a way that an aneroid barometer utilise angular position as the signal to convey information, specifically, the pressure. By changing their voltage, current, frequency, or total charge, electrical signals may represent information and such information is convertible from some other physical form like sound, pressure, light, position, temperature, etc. to an electrical signal by means of a transducer.
