• DocumentCode
    2393198
  • Title

    Dynamic calibration of feedback DAC non-linearity for a 4th order CT sigma delta for digital hearing aids

  • Author

    Naqvi, Syed R. ; Deligoz, Ilker ; Kiaei, Sayfe ; Bakkaloglu, Bertan

  • Author_Institution
    Arizona State Univ., Tempe, AZ, USA
  • fYear
    2011
  • fDate
    26-28 Sept. 2011
  • Firstpage
    109
  • Lastpage
    113
  • Abstract
    In this paper we present a calibration scheme for calibrating the 2nd order harmonic distortion of feedback DAC used in a 4th order CT-ΣΔ. This scheme was implemented in a 0.25um CMOS process with a supply voltage of 1.2V, the 4th order CT-ΣΔ was able to achieve 68dB measured SNR, while the 2nd order harmonic was reduced by about 20dB suppressing it to the thermal noise floor.
  • Keywords
    calibration; harmonic distortion; hearing aids; 2nd order harmonic distortion; 4th order CT sigma delta; CMOS process; digital hearing aids; dynamic calibration; feedback DAC nonlinearity; Calibration; Harmonic distortion; MOS devices; Modulation; Signal to noise ratio; Transient analysis;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    SOC Conference (SOCC), 2011 IEEE International
  • Conference_Location
    Taipei
  • ISSN
    2164-1676
  • Print_ISBN
    978-1-4577-1616-4
  • Electronic_ISBN
    2164-1676
  • Type

    conf

  • DOI
    10.1109/SOCC.2011.6085129
  • Filename
    6085129
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2393198