Question

Given the following specifications of an oversampling DSP system: Audio input frequency range: $0-20 \mathrm{kHz}$ Second-order SDM with a sampling rate of $160 \mathrm{kHz}$ ADC resolution in $\mathrm{SDM}=10$ bits, (a) Draw the block diagram using the DSP model; (b) Determine the equivalent (effective) ADC resolution.

   Given the following specifications of an oversampling DSP system:
Audio input frequency range: $0-20 \mathrm{kHz}$
Second-order SDM with a sampling rate of $160 \mathrm{kHz}$
ADC resolution in $\mathrm{SDM}=10$ bits,
(a) Draw the block diagram using the DSP model;
(b) Determine the equivalent (effective) ADC resolution.

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Digital Signal Processing: Fundamentals and Applications

Digital Signal Processing: Fundamentals and Applications

Lizhe Tan, Jean… 3rd Edition

Chapter 11, Problem 18

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Step 1

In this case, the Nyquist frequency is $80 \mathrm{kHz}$. The oversampling SDM then samples the filtered audio signal at a rate of $160 \mathrm{kHz}$, which is four times the Nyquist frequency. The SDM is a second-order sigma-delta modulator, which converts the Show more…

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Given the following specifications of an oversampling DSP system: Audio input frequency range: $0-20 \mathrm{kHz}$ Second-order SDM with a sampling rate of $160 \mathrm{kHz}$ ADC resolution in $\mathrm{SDM}=10$ bits, (a) Draw the block diagram using the DSP model; (b) Determine the equivalent (effective) ADC resolution.

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