PhysicsChapter 9: Electronics
Analogue Versus Digital
Introduction
An analogue signal can vary continuously over a range of values. A digital signal uses separate, distinct levels. In simple binary electronics these are commonly represented as 0 and 1. For example, the electrical signal produced directly by a microphone may vary continuously with sound and is therefore analogue. A computer processes information digitally using binary states.
Definition
Analogue
Continuous variation. Can take many values within a range. Represents physical quantities naturally.
Digital
Distinct levels. Commonly uses binary 0 and 1. Well suited to computer processing, storage and transmission.
Converting Signals
An **analogue-to-digital converter (ADC) converts an analogue signal into digital data. A digital-to-analogue converter (DAC)** can convert digital information into an analogue output.
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Review the key facts, formulas and checks before you move on.Analogue Versus Digital
Sticky Notes · Quick Revision
ANALOGUE
- Continuous
DIGITAL
- Discrete
BINARY
- 01
60-second revision
- Analogue → continuous.
- Digital → discrete.
- Binary → 0 and 1.
- ADC → analogue to digital.
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