Improved Delta Sigma Modulators for High Speed Applications

David Gautier (1) , Michel Robbe (2) , Stephan Doucet (2) , Renaud Lemoine (2) , Smail Bachir (3) , Claude Duvanaud (3)

1 LAII [Poitiers] - Laboratoire d'automatique et d'informatique industrielle [EA 1219]
2 Chercheur indépendant
3 SIC

This article presents a new Low-Pass Delta Sigma Modulators (LPDS) architecture to improve the noise shaping for high frequency applications. The errors resulting from approximations made by calculating with 1/2N coefficients are compensated. Simulations with extracted parasitics of the layout are made and give a SNDR of 111 dB, 3.8 mW power consumption at 4 GHz in 65 nm CMOS technology for UMTS standard.

Mots clés: Delta-sigma modulation; Digital modulation; Feedback; Multiaccess communication; Noise shaping; Radio transmitters; Signal to noise ratio; Transceivers

Domaines: Electronique

David Gautier, Michel Robbe, Stephan Doucet, Renaud Lemoine, Smail Bachir, et al.. Improved Delta Sigma Modulators for High Speed Applications. 52nd IEEE International Midwest Symposium on Circuits and Systems MWSCAS, Aug 2009, Cancun, Mexico. pp.385 - 388, ⟨10.1109/MWSCAS.2009.5236075⟩. ⟨hal-00782510⟩