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Active-Passive Delta Sigma Modulator for High-Resolution and Low-Power Applications
Hussain, Arshad1; Sin, Sai-Weng1; Chan, Chi-Hang1; U, Seng-Pan (Ben)1; Maloberti, Franco2; Martins, Rui P.1
2017-01
Source PublicationIEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
ISSN1063-8210
Volume25Issue:1Pages:364-374
Abstract

This paper discusses the use of a low gain amplifier and a passive switched-capacitor (SC) network to enable the SC integrator function. The method is applied to a delta-sigma modulator to achieve high resolution as proved by the 65-nm CMOS technology test vehicle. Compared with the conventional operational amplifier (op-amp)-based SC integrator, this solution utilizes a low-gain open-loop amplifier to drive a passive SC integrator with positive feedback. Since the open-loop amplifier requires a low dc gain and implements an embedded current adder, the power consumption is very low. Power reduction for single bit is obtained by using passive feed-forward with built-in adder to assist the first amplifier. The low swing obtained at the output of the active blocks relaxes the slew rate requirement and enhances the linearity. Implemented in 65-nm digital CMOS technology with an active area of 0.1 mm(2), the test chip achieves a dynamic range of 91 dB, peak signal-to-noise ratio of 88.4 dB, peak signal-to-noise-plus-distortion ratio of 88.2 dB, and a spurious free dynamic range of 106 dB while consuming 73.6 mu W in a 25-kHz signal bandwidth at 1 V supply, yielding a FoM(Walden) of 70 fJ/conv-step and FoM(Schreier) of 176 dB.

KeywordDelta-Sigma Modulator (Delta Sigma m) Discrete Time (Dt) Low-gain-amplifier-based Switched-capacitor (Sc) Integrator Noise Shaping Passive Sc Integrator
DOI10.1109/TVLSI.2016.2580712
URLView the original
Indexed BySCI
Language英语
WOS Research AreaComputer Science ; Engineering
WOS SubjectComputer Science, Hardware & Architecture ; Engineering, Electrical & Electronic
WOS IDWOS:000394591600030
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
The Source to ArticleWOS
Fulltext Access
Citation statistics
Cited Times [WOS]:6   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Faculty of Science and Technology
INSTITUTE OF MICROELECTRONICS
Corresponding AuthorHussain, Arshad; Sin, Sai-Weng; Chan, Chi-Hang; U, Seng-Pan (Ben); Maloberti, Franco; Martins, Rui P.
Affiliation1.State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macau, China
2.Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Pavia, Italy
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Hussain, Arshad,Sin, Sai-Weng,Chan, Chi-Hang,et al. Active-Passive Delta Sigma Modulator for High-Resolution and Low-Power Applications[J]. IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS,2017,25(1):364-374.
APA Hussain, Arshad,Sin, Sai-Weng,Chan, Chi-Hang,U, Seng-Pan ,Maloberti, Franco,&Martins, Rui P..(2017).Active-Passive Delta Sigma Modulator for High-Resolution and Low-Power Applications.IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS,25(1),364-374.
MLA Hussain, Arshad,et al."Active-Passive Delta Sigma Modulator for High-Resolution and Low-Power Applications".IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS 25.1(2017):364-374.
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