Design and implementation of an audio analog to digital converter using oversampling techniques

Sonia Boujelben , Chiheb Rebai (1) , Dominique Dallet (2) , Philippe Marchegay (2)

1 SUP'COM
2 IMS - Laboratoire de l'intégration, du matériau au système

Presents a sigma delta converter that over samples the analogue signal to obtain high-resolution digital data. A second order 1-bit sigma delta modulator will be considered as the front-end A/D converter and designed in switched current S2I technique to achieve 1-bit quantizing at 1.024 MHz. The subsequent decimation filter reduces the sampling rate by a factor of 64 and guarantees a stop band attenuation of 80 dB. The modulator was implemented in a 0.6 micro m three metal layer digital CMOS process from single 3.3 V power supply and the decimation filter is simulated under signal processing workstation SPW. The measured dynamic range of the modulator is over 8 bits

Domaines: Micro et nanotechnologies/Microélectronique

Sonia Boujelben, Chiheb Rebai, Dominique Dallet, Philippe Marchegay. Design and implementation of an audio analog to digital converter using oversampling techniques. ICECS 2001, Sep 2001, La valette, Malta. pp.1043-1047, ⟨10.1109/ICECS.2001.957663⟩. ⟨hal-00567956⟩