PIPELINED ANALOG-DIGITAL CONVERTERS INTEGRAL NONLINEARITY MODELING FOR POST-CORRECTION |
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| 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.
- Download:
- IMEKO-IWADC-2010-043.pdf
- DOI:
- -
- 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