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A 5.35 mW 10 MHz bandwidth CT third-order ΔΣ modulator with single Opamp achieving 79.6/84.5 dB SNDR/DR in 65 nm CMOS
Wei Wang1,2,3; Yan Zhu1,2,3; Chi-Hang Chan1,2,3; Seng-Pan U.1,2,3; Rui Paulo Martins1,2,4
2017-12-26
Conference NameIEEE Asian Solid-State Circuits Conference (A-SSCC)
Source Publication2017 IEEE Asian Solid-State Circuits Conference (A-SSCC)
Volume2017-January
Pages285-288
Conference DateNovember 6-8, 2017
Conference PlaceSeoul, SOUTH KOREA
Abstract

This paper presents a power-efficient single-loop continuous-time (CT) third-order sigma delta (ΔΣ) modulator that achieves a SNDR of 79.6 dB over a 10 MHz signal bandwidth. The modulator uses a feedforward-feedback (CIFF-FB) architecture which incorporates a single amplifier biquad (SAB) and a passive integrator to realize a third-order noise shaping. We also propose a continuous-time complementary (CTC) approach for the amplifier to improve the power efficiency. To alleviate the switch driver mismatch and jitter, we introduce an adaptive latch in the DAC driver. The modulator operates at a sampling rate of 640 MHz and consumes 5.35 mW from 1.2 V and 1.8 V power supplies. It achieves a DR of 84.5 dB and a SNDR of 79.6 dB with 10 MHz signal bandwidth, resulting in a Schreier FOM of 172.3 dB or 177.2 dB based on SNDR or DR, respectively.

DOIhttp://doi.org/10.1109/ASSCC.2017.8240272
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000426511300072
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Citation statistics
Document TypeConference paper
CollectionINSTITUTE OF MICROELECTRONICS
Faculty of Science and Technology
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macao, China
2.Also with Department of ECE, Faculty of Science of Technology, University of Macau, Macao, China
3.Also with Synopsys Macau Ltd.
4.On leave from Instituto Superior Técnico/Universidade de Lisboa, Portugal
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Wei Wang,Yan Zhu,Chi-Hang Chan,et al. A 5.35 mW 10 MHz bandwidth CT third-order ΔΣ modulator with single Opamp achieving 79.6/84.5 dB SNDR/DR in 65 nm CMOS[C],2017:285-288.
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