The analog input to the oversampled A/D converter system shown in Fig. 18.14 contains a signal power of within a signal bandwidth of and white noise with a spectral density of . Assuming a first-order anti-aliasing filter is used, what is the SNR at the input to the modulator, ? Assuming a 1-bit first-order modulator, what is required to ensure that quantization noise is less than the input noise?
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