A continuous-time VCO-assisted VCO-based ΣΔ modulator with 76.6dB SNDR and 10MHz BW
Yun Du1; Tao He1; Yang Jiang1; Sai-Weng Sin1; Seng-Pan U1,2; R.P.Martins1,3
2013
Conference NameIEEE International Symposium on Circuits and Systems (ISCAS)
Source Publication2013 IEEE International Symposium on Circuits and Systems (ISCAS2013)
Pages373-376
Conference DateMAY 19-23, 2013
Conference PlaceBeijing, PEOPLES R CHINA
Abstract

In this paper, a new VCO-assisted VCO-based sigma-delta (ΣΔ) modulator is proposed to improve the linearity of the VCO-based quantizer. The assistant network in the digital feedforward path reduces the input swing of the VCO-based quantizer in the main path, and then adds it together through the digital cancellation path to keep the same signal before and after quantization. Moreover, the merit of the auxiliary VCO increases the tolerance to DAC mismatches because of its intrinsic DEM function, which also simplifies the digital circuit part. A first order continuous-time (CT) ΣΔ modulator with the proposed structure is designed and simulated in a 65nm CMOS process. The performance of the modulator can reach 76.6dB/82.4dB SNDR/SNR with second order noise shaping and 84dB DR within a 10MHz bandwidth and a sampling frequency of 1.4GHz, consuming 9.4mW of power. © 2013 IEEE.

DOIhttp://doi.org/10.1109/ISCAS.2013.6571858
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000332006800092
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Cited Times [WOS]:0   [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
Yun Du,Tao He,Yang Jiang,et al. A continuous-time VCO-assisted VCO-based ΣΔ modulator with 76.6dB SNDR and 10MHz BW[C],2013:373-376.
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