Analogue and digital signals
Analogue and digital signals
An analogue signal can take any value in a continuous range, so its waveform is smooth. A microphone output voltage is analogue because the voltage changes continuously as the sound pressure changes.
Step-by-step lessons on AQA A Level Physics Difference between analogue and digital signals (A-level only). Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.