Digital compensation for MASH sigma delta modulators using H-infinity approach

Author

Chou, Yung-Shan ; Lin, Chun-Chen

Author_Institution

Dept. of Electr. Eng., Tamkang Univ., Taipei

fYear

2008

fDate

12-15 Oct. 2008

Firstpage

3189

Lastpage

3194

Abstract

This paper presents a new digital compensation scheme for MASH (cascaded) sigma-delta modulators (SigmaDeltaMs) with 1-bit quantizer. The compensation scheme is designed based on the well-known internal model principle and H-infinity control theory. For numerical illustration, we concentrate on a MASH 2-1 SigmaDeltaM architecture for low and middle frequencies applications. Comparisons between the proposed SigmaDeltaM and the conventional one are made, which reveal that the proposed SigmaDeltaM outperforms the conventional one in several aspects - signal-to-noise ratio (SNR), dynamic range (DR), output swing.

Keywords

H^infin control; analogue-digital conversion; cascade systems; modulators; quantisation (signal); sigma-delta modulation; H-infinity control theory; MASH sigma delta modulators; SNR; cascaded SigmaDeltaM; digital compensation scheme; dynamic range; output swing; quantizer; signal-to-noise ratio; Degradation; Delta modulation; Delta-sigma modulation; Digital filters; Digital modulation; H infinity control; Multi-stage noise shaping; Robust control; Signal to noise ratio; Transfer functions; H-infinity; cascaded sigma-delta modulator; digital filter; dynamic range; signal-to-noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Systems, Man and Cybernetics, 2008. SMC 2008. IEEE International Conference on

Conference_Location

Singapore

ISSN

1062-922X

Print_ISBN

978-1-4244-2383-5

Electronic_ISBN

1062-922X

Type

conf

DOI

10.1109/ICSMC.2008.4811786

Filename

4811786