How to classify A/D converters?
* Question
| How to classify A/D converters? |
* Answer
| According to the sampling rate factory.In relation to the signal frequency, the A/D converter can be divided into three types: a Nyquist frequency A/D converter, a band pass sampling A/D converter, and an oversampling A/D converter.Because the anti-aliasing filter is unlikely to have ideal low-pass characteristics, there must be a transition band, so the sampling frequency needs to be slightly higher than twice the bandwidth of the analog signal.
The rear digital filter circuit is used to remove noise outside the signal bandwidth.Oversampling techniques can be used to reduce the quantization noise level, resulting in a highly accurate A/D converter.If performance is used, the A/D converter can be divided into a high-speed A/D converter and a high-precision A/D converter. |
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