Automatic model refinement of GmC integrators for high-level simulation of continuous-time Sigma-Delta modulators

Abstract : A ΣΔ GmC integrator refinement flow is presented. The classically simplified GmC integrator small-signal model was upgraded to be extremely accurate by considering the complete transistor small-signal model. A circuit-level knowledge-based tool was used to execute the designer defined sizing procedure and to extract small signal parameters. By associating the symbolic transfer function to small-signal parameters, the flow, entirely implemented with C++, is able to compute poles and zeros to permit precise behavioral simulations. A 2nd order ΣΔ modulator was chosen to visualize performance degradations while the specifications were not achievable.
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https://hal.archives-ouvertes.fr/hal-00627057
Contributor : Michel Vasilevski <>
Submitted on : Tuesday, September 27, 2011 - 4:10:02 PM
Last modification on : Thursday, March 21, 2019 - 1:12:31 PM

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Michel Vasilevski, Hassan Aboushady, Marie-Minerve Louërat. Automatic model refinement of GmC integrators for high-level simulation of continuous-time Sigma-Delta modulators. ISCAS'09 - IEEE International Symposium on Circuits and Systems, May 2009, Taipei, Taiwan. pp.2769-2772, ⟨10.1109/ISCAS.2009.5118376⟩. ⟨hal-00627057⟩

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