• DocumentCode
    3682301
  • Title

    A 106.7-dB DR, 390-μW CT 3rd-order ΣΔ modulator for MEMS microphones

  • Author

    C. De Berti;P. Malcovati;L. Crespi;A. Baschirotto

  • Author_Institution
    Department of Electrical, Computer, and Biomedical Engineering - University of Pavia, Pavia, Italy
  • fYear
    2015
  • Firstpage
    209
  • Lastpage
    212
  • Abstract
    A 3rd-order continuous-time ΣΔ modulator for MEMS microphones in 0.16-μm CMOS technology achieves 106.7-dB DR and 93.2-dB peak SNDR, consuming 390 μW from a 1.6-V power supply and occupying an area of 0.21 mm2. The ΣΔ modulator, based on a feedforward architecture, uses only two operational amplifiers for achieving the 3rd-order loop-filter transfer function, a 15-level quantizer, and a feedback DAC with three-level current-steering elements, which minimizes the noise contribution at small input signal, in order to achieve a DR > 100 dB with the largest reported Schreier FoM (184 dB).
  • Keywords
    "Noise","Microphones","Feedforward neural networks","Power demand","Transfer functions","Resistors","Modulation"
  • Publisher
    ieee
  • Conference_Titel
    European Solid-State Circuits Conference (ESSCIRC), ESSCIRC 2015 - 41st
  • ISSN
    1930-8833
  • Print_ISBN
    978-1-4673-7470-5
  • Type

    conf

  • DOI
    10.1109/ESSCIRC.2015.7313864
  • Filename
    7313864
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3682301