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Scaling of ΣΔ-Modulator<br />

1. If inputs of integrators become too large for a significant time<br />

the integrators saturate<br />

non-linearity clipping strong non-linear distortion<br />

(Comparator should be only non-linear component)<br />

2. Exploit full dynamic range for good SNR<br />

Modulator Scaling:<br />

Linear transformation so that<br />

saturation of integrators is avoided<br />

dynamic range is exploited<br />

Stephan Henzler Mixed-Signal-Electronics 2012/13<br />

298

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