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A novel effective bandpass semi-MASH sigma-delta modulator with double-sampling mismatch-free resonator
Lao C.-I.1; Seng-Pan U.1,2; Martins R.P.1
2006-12-01
Conference Name2006 IEEE International Symposium on Circuits and Systems
Source PublicationProceedings - IEEE International Symposium on Circuits and Systems
Pages581-584
Conference Date21-24 May 2006
Conference PlaceIsland of Kos, Greece
Abstract

This paper presents a novel high-order bandpass semiMASH sigma-delta modulator (4-2+2-...-2+2mb) with f /4 center frequency. The proposed topology employs a semi-MASH technique with a 4-2 mb topology to achieve an expandable and extendable high-order bandpass noise-shaping. To illustrate the novel architecture's behavior an 8×OSR 12-order 1.5-bit semi-MASH sigma-delta modulator is designed achieving 88 dB SNQR (signal-toquantization-error ratio) at -IdB overloading point (90% of the modulator full-scale). A double-sampling mismatch-free single-opamp double-delay resonator is also proposed for the semi-MASH sub-stages to improve the overall design performance. © 2006 IEEE.

DOIhttp://doi.org/10.1109/ISCAS.2006.1692652
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Document TypeConference paper
CollectionFaculty of Science and Technology
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Analog and Mixed-Signal VLSI Laboratory, FST, University of Macau, Macao, China
2.Chipidea Microelectronics (Macau) Ltd., 2
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Lao C.-I.,Seng-Pan U.,Martins R.P.. A novel effective bandpass semi-MASH sigma-delta modulator with double-sampling mismatch-free resonator[C],2006:581-584.
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