Article | REF: E370 V1

Analog-to-digital and digital-to-analog conversion (part 1)

Author: Claude PRÉVOT

Publication date: February 10, 2004

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3. Principles of data conversion

3.1 Presentation

  • Analog-to-digital conversion has a dual effect with respect to the initial analog signal:

    • Quantize (*) it in amplitude, i.e. replace a continuous signal in amplitude with a sequence of discrete values.

    Note :

    Quantify: a quantified quantity can only vary discontinuously, usually in multiples of an elementary quantity.

    • Time sampling (*), i.e. replacing a continuous signal in time with a sequence of values taken at discrete instants.

    Note :

    Sampling: the act of taking a sample, usually at regularly spaced points in time. [Sample: small quantity of a commodity...

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Principles of data conversion