| How Analog-to-Digital Converter (ADC) Works |
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| Inside an ADC |
You can consider the analog-to-digital converter as a closed box, as shown on Figure 5. But what is inside the box? That is exactly what we are going to explain now.
click to enlarge
Figure 5: Analog-to-digital converter.
There are several ways to build an ADC. We can divide ADC design into four main groups:
- Parallel design (also known as Flash ADC);
- Digital-to-Analog Converter-based design (e.g. ramp counter, successive approximation, tracking);
- Integrator-based design (e.g. single-slope, dual-slope);
- Sigma-delta design (also known as delta-sigma, 1-bit ADC or oversampling ADC).
Each one of these main groups can have several different implementations. We are going to talk about each one of these groups individually. |
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