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PIPELINED ANALOG-DIGITAL CONVERTERS INTEGRAL NONLINEARITY MODELING FOR POST-CORRECTION

Samer Medawar, Peter Händel, Niclas Björsell, Magnus Jansson
  • Abstract:
    An input-dependent integral nonlinearity (INL) model is developed for pipeline ADC post-correction. The INL model consists of a static and dynamic part. The INL model is subtracted from the ADC digital output for compensation. Static compensation is performed by adjacent sets of gains and offsets. Each set compensates a certain output code range. The frequency content of the INL dynamic component is used to design a set of filter blocks that performs ADC compensation in the time domain. The compensation scheme is applied to measured data of two 12-bit ADCs of the same type (Analog Devices AD9430). Significant performance improvements in terms of spurious free dynamic range (SFDR) are obtained.
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  • DOI:
    _unreg_iwadc-2010.043

Event details:

  • IMEKO TC:
    TC4
  • Event name:
    "Instrumentation for the Information and Communication Technology Era"
  • Title:
    15th International Workshop on ADC Modelling and Testing & XVIIth IMEKO TC4 Symposium (together with 3rd IMEKO TC19 Symposium) (IWADC)
  • Place:
    Kosice, SLOVAKIA
  • Time:
    08 September 2010 - 10 September 2010