Abstract
In this paper the automated high-level synthesis of subsampling continuous-time bandpass ΣΔ modulators including non-idealities is described. State-of-the-art design methodologies for bandpass ΣΔ modulators involve multiple steps and transformations to derive high-level coefficients of CT modulators. Successive tuning to account for non-idealities is required in the design process which is even more time consuming. The web-based design-tool www.sigma-delta.de on the other hand allows the modulator synthesis within seconds, directly in the CT domain. The high-level coefficients are optimized while non-idealities are taken into account. Moreover, the STF is optimized with regard to a given specification while the SNR is maximized. This work shows the newly developed resonator models and the inclusion of subsampling capabilities in this web-based design tool. The models are presented and circuit simulator based examples show the functionality.
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