A DT 0-2 MASH ΣΔ modulator with VCO-based quantizer for enhanced linearity
Tao He1; Yun Du1; Yang Jiang1; Sai-Weng Sin1; Seng-Pan U1,2; R.P.Martins1,3
2012
Conference NameIEEE Asia Pacific Conference on Circuits and Systems (APCCAS)
Source Publication2012 IEEE Asia Pacific Conference on Circuits and Systems
Pages33-36
Conference Date2-5 Dec. 2012
Conference PlaceKaohsiung, TAIWAN
Abstract

This paper presents a new structure of the discrete time 0-2 MASH sigma-delta modulator implemented with VCO-based quantizer in the second stage. The proposed scheme enhances the linearity of the VCO based quantizer, meanwhile it takes advantage of the intrinsic DEM function and first order noise shaping in the second stage. Besides, the matching requirement is relaxed and the digital canceling filter is largely simplified. Moreover, no additional active adder in or between two stages is needed because of the 0-2 MASH structure, which can save a lot of power. The proposed DT 0-2 MASH sigma-delta (ΣΔ) modulator with 10MHz signal bandwidth for wideband applications is designed and simulated in Matlab. The performance of the modulator can reach 97dB SND Runder a sampling rate of 1.15GHz. © 2012 IEEE.

DOIhttp://doi.org/10.1109/APCCAS.2012.6418964
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000316598900009
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Citation statistics
Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.State-Key Laboratory of Analog and Mixed Signal VLSI. Faculty of Science and Technology, University of Macau, Macao, China
2.Also with Synopsys - Chipidea Microelectronics (Macau) Limited
3.On leave from Instituto Superior Técnico/TU of Lisbon, Portugal
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Tao He,Yun Du,Yang Jiang,et al. A DT 0-2 MASH ΣΔ modulator with VCO-based quantizer for enhanced linearity[C],2012:33-36.
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