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Models and Implementation of a Dynamic Element Matching DAC

  • Niklas U. Andersson
  • K. Ola Andersson
  • Mark Vesterbacka
  • J. Jacob Wikner
Article

Abstract

The dynamic element matching (DEM) techniques for digital-to-analog converters(DACs) has been suggested as a promising method to improve matching between the DAC's referencelevels. However, no work has so far taken the dynamic effects that limit the performance for higher frequenciesinto account. In this paper we present a model describing the dynamic properties of a DEM DAC and compare thesimulated results with measurements of a 14-bit current-steering DEM DAC implemented in a 0.35-μm CMOSprocess. The measured data agrees well with the results predicted by the used model. It is also shown that theDEM technique does not necessarily increase the performance of a DAC when dynamic errors are dominating theachievable performance.

DAC DEM CMOS matching current-steering 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Niklas U. Andersson
    • 1
  • K. Ola Andersson
    • 2
  • Mark Vesterbacka
    • 3
  • J. Jacob Wikner
    • 4
  1. 1.Linköping Design Center, Ericsson Microelectronics ABLinköping UniversityLinköpingSweden
  2. 2.Department of Electrical EngineeringLinköping UniversityLinköpingSweden
  3. 3.Department of Electrical EngineeringLinköping UniversityLinköpingSweden
  4. 4.Ericsson Microelectronics, Westmead Dr.Swindon Design CentreSwindonUnited Kingdom

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