• DocumentCode
    2103364
  • Title

    A 470μA direct readout circuit for electret and MEMS digital microphones

  • Author

    Barbieri, Alan ; Nicollini, Germano

  • Author_Institution
    ST-Ericsson, Agrate Brianza, Italy
  • fYear
    2013
  • fDate
    8-11 Dec. 2013
  • Firstpage
    341
  • Lastpage
    344
  • Abstract
    A direct readout circuit configurable for electret or MEMS digital microphones is presented. The circuit includes a transducer interface, a programmable preamplifier, a 4th order ΣΔ modulator, a bandgap reference, a clock detection circuit, and a stability recovery system. A prototype has been realized in a 0.25μm CMOS process, performing 63dBA SINAD at 1Pa, and a consumption of 470μA at 1.6V supply voltage.
  • Keywords
    CMOS integrated circuits; acoustic transducers; electrets; micromechanical devices; microphones; preamplifiers; readout electronics; reference circuits; sigma-delta modulation; CMOS process; MEMS digital microphones; bandgap reference; clock detection circuit; current 470 muA; direct readout circuit; electret; fourth order sigma-delta modulator; programmable preamplifier; size 0.25 mum; stability recovery system; transducer interface; voltage 6 V; Clocks; Electrets; Micromechanical devices; Microphones; Modulation; Noise; Preamplifiers;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Electronics, Circuits, and Systems (ICECS), 2013 IEEE 20th International Conference on
  • Conference_Location
    Abu Dhabi
  • Type

    conf

  • DOI
    10.1109/ICECS.2013.6815424
  • Filename
    6815424
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2103364