Design techniques for very high speed digital delta-sigma modulators aimed at all-digital RE transmitters

Antoine Frappé (1, 2) , A. Flament (2) , Andreas Kaiser (2) , Bruno Stefanelli (2) , A. Cathelin (3) , R. Daouphars (3)

1 MICROELEC SI - IEMN - Microélectronique Silicium - IEMN
2 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
3 ST-CROLLES - STMicroelectronics [Crolles]

This paper presents a very high-speed delta-sigma modulator for achieving digital generation of radio-frequency signals. About 68 dB of ACLR (adjacent channel leakage ratio) is obtained on the 7.8 GS/s output of the delta-sigma modulator for WCDMA standard. This is achieved by using original concepts like borrow-save arithmetic, non-exact quantization and differential dynamic logic.

Domaines: Sciences de l'ingénieur [physics]

Antoine Frappé, A. Flament, Andreas Kaiser, Bruno Stefanelli, A. Cathelin, et al.. Design techniques for very high speed digital delta-sigma modulators aimed at all-digital RE transmitters. 2006 13th IEEE International Conference on Electronics, Circuits and Systems, Dec 2006, Nice, France. pp.1113-1116, ⟨10.1109/ICECS.2006.379634⟩. ⟨hal-03377054⟩