
Electrical and electronic principles
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Figure 1.32 Digital-to-analogue converter
Figure 1.33 Ramp analogue-to-digital converter
The main problem with this system is that the accuracy of the output depends
on the tolerance of the resistors. Other types of digital-to-analogue converter
are available, such as the R2R ladder network, but the principle of operation is
similar to the above description.
1.3.12 Analogue-to-digital conversion
The purpose of this circuit is to convert an analogue signal, such as that
received from a temperature thermistor, into a digital signal for use by a
computer or a logic system. Most systems work by comparing the ...