Behavioral Study of a Second Order Sigma Delta Modulator Using Switched-Current Technique

Dominique Dallet (1) , Mourad Loulou (2) , Philippe Marchegay (1)

1 IMS - Laboratoire de l'intégration, du matériau au système
2 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

In this paper we present a method for the modelization of Sigma-Delta modulators using switched current technique for implementation. The purpose of this work is to allow behavioral study of modulators, taking account the main problem of this technique which is charge injection in MOS switches. The idea consists of a mathematical modeling of charge injection phenomena implemented on MATLAB software to analyze the distortion on modulator output spectrum. Simulation results using the proposed model are presented and compared with measurement results from designed modulator; it shows the efficiency of the model used and permits to analyze the effect of different levels of errors on the behaviors of Sigma-Delta modulator

Domaines: Micro et nanotechnologies/Microélectronique

Dominique Dallet, Mourad Loulou, Philippe Marchegay. Behavioral Study of a Second Order Sigma Delta Modulator Using Switched-Current Technique. IWADC 1998, Sep 1998, Naple, Italy. pp.839-842. ⟨hal-00568120⟩