Analogue and Digital Signals

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  • Created by: Abbie
  • Created on: 25-02-12 21:56

Digital and Analogue Signals

Information (e.g. sounds and pictures) is converted into electrical signals before it can be transmitted

It's sent down telephone wires or carried on electromagnetic waves

Analogue signals:

  • The amplitude and frequency can vary continuously
  • Dimmer switches, thermometers, speedometers and old fashioned watches are all anologue devices

Digital signals:

  • They are coded pulses that can only take two values, on or off
  • On/off switches and the displays on digital clocks and…


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