This chapter discusses that the important effect of oversampling is that the power of the error associated with the quantization (quantization noise) is spread over a band that is much wider than the band of interest. Thus the digital output of an over sampled A/D converter contains a given fraction of the quantization noise that is pushed out of the band of interest. This fraction can be filtered out without affecting the informative content associated with the input signal. After filtering, the power of the quantization noise is reduced and, in turn, the resolution of the converter is increased.
Oversampling converters, Page 1 of 2
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