Page 160 - Bebop to The Boolean Boogie An Unconventional Guide to Electronics Fundamentals, Components, and Processes

Analog-to-Digital and Digital-to-Analog 14 1

Analog-to-Digital
Converter

I To Digital
System

Analog Domain Digital Domain
D4

The output from the sensor typically undergoes some form of signal
processing such as filtering and amplification before being passed to the AID
converter. This signal processing is generically referred to as conditioning. The
A/D converter accepts the conditioned analog voltage and converts it into a
series of equivalent digital values by sumpling and qwntizution (Figure 13-3).

Analog 3-Bit Digital
Signal Equivalent
I
Range

000 001 100 111 111 100 110 1r /OF 011 100
~
I Sampled Values I

Figure 13-3. The sampling and quantization of a digital signal