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A 5.35-mW 10-MHz Single-Opamp Third-Order CT Delta Sigma Modulator With CTC Amplifier and Adaptive Latch DAC Driver in 65-nm CMOS
Wang, Wei; Zhu, Yan; Chan, Chi-Hang; Martins, Rui Paulo
2018-10
Conference NameIEEE JOURNAL OF SOLID-STATE CIRCUITS
Volume53
Issue10
Pages2783-2794
Publication Place445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
AbstractThis paper reports a continuous-time (CT) third-order delta-sigma modulator that features a single amplifier biquad (SAB) and a passive integrator to simplify the circuit to just one power hungry operation amplifier (opamp). Such setup not only relaxes the gain and bandwidth requirement of the opamp design but also enhances the overall modulator stability which enables a power-efficient loop filter implementation. We used an SAR architecture in the quantizer with an advanced feedback technique to alleviate its speed penalty. By incorporating the proposed CT complementary (CTC) opamp and an adaptive latch scheme in the DAC driver, the modulator attains a signal bandwidth of 10 MHz with 79.6-dB signal-to-noise and distortion ratio (SNDR) while only consuming 5.35 mW from 1.2- and 1.8-V power supplies. The prototype has a dynamic range of 84.5 dB and a Schreier FoM of 177.2 dB with an active area of 0.033 mm(2).
KeywordTerms-Analog-to-digital conversion (ADC) continuous-time (CT) delta-sigma modulator DAC driver passive integrator single amplifier biquad (SAB)
DOI10.1109/JSSC.2018.2852326
URLView the original
Indexed BySCI ; CPCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000446116400006
The Source to ArticleWOS
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionUniversity of Macau
Recommended Citation
GB/T 7714
Wang, Wei,Zhu, Yan,Chan, Chi-Hang,et al. A 5.35-mW 10-MHz Single-Opamp Third-Order CT Delta Sigma Modulator With CTC Amplifier and Adaptive Latch DAC Driver in 65-nm CMOS[C]. 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC,2018:2783-2794.
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