A first-order low distortion sigma-delta modulator using split DWA technique and SAR quantizer

Tien Feng Hsu, Chun Po Huang, I. Jen Chao, Soon-Jyh Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents a comparator-based OTA first-order discrete-time low-distortion sigma-delta modulator. A split data weighted averaging (DWA) algorithm logic is proposed to release the heavy burden of digital circuit while a 6 bit DAC is implemented in this work. In addition, a comparator-based OTA is used to reduce the power consumption. On the top of that, to achieve lower power consumption, a power efficient SAR quantizer with embedded analog passive adder is proposed to eliminate additional operational amplifier for summation. The modulator core occupies an active area of 0.0275 mm2 in TSMC 90-nm 1P9M CMOS process. Experimental results show that the proposed modulator achieves 59.90 dB SNDR with 0.58 mW power consumption under 1.0 V supply voltage, an OSR of 16 at 65 MHz sampling frequency and 500kHz input frequency.

Original languageEnglish
Title of host publication2015 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479962754
DOIs
Publication statusPublished - 2015 May 28
Event2015 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2015 - Hsinchu, Taiwan
Duration: 2015 Apr 272015 Apr 29

Publication series

Name2015 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2015

Other

Other2015 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2015
CountryTaiwan
CityHsinchu
Period15-04-2715-04-29

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All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

Hsu, T. F., Huang, C. P., Chao, I. J., & Chang, S-J. (2015). A first-order low distortion sigma-delta modulator using split DWA technique and SAR quantizer. In 2015 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2015 [7114518] (2015 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/VLSI-DAT.2015.7114518