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Measurement verification of estimation method for time errors in a time-interleaved A/D converter system
Linköping University, Department of Electrical Engineering. Linköping University, The Institute of Technology.
Linköping University, Department of Electrical Engineering. Linköping University, The Institute of Technology.
Ericsson Microelectronics AB, Linköping, Sweden.
2002 (English)In: Proceedings of the 2002 IEEE International Symposium on Circuits and Systems, 2002, Vol. 3, 129-132 vol.3 p.Conference paper (Refereed)
Abstract [en]

A previously presented method for estimation of time errors in time-interleaved A/D converter systems is here verified on measurements from a dual A/D converter system. The advantage of this estimation method, compared to other methods, is that it does not require any knowledge about the input signal. The estimation is most accurate for slowly varying input signals but the signal quality is improved even when the estimation is done for a sinusoidal signal close to the Nyquist frequency.

Place, publisher, year, edition, pages
2002. Vol. 3, 129-132 vol.3 p.
Keyword [en]
Sampling, A/D conversion, Estimation, Measurement
National Category
Control Engineering
URN: urn:nbn:se:liu:diva-90258DOI: 10.1109/ISCAS.2002.1010177ISBN: 0-7803-7448-7OAI: diva2:614783
2002 IEEE International Symposium on Circuits and Systems, Scottsdale, AZ, USA, May, 2002
Available from: 2013-04-07 Created: 2013-03-24 Last updated: 2013-12-19
In thesis
1. ADC modeling for system simulation
Open this publication in new window or tab >>ADC modeling for system simulation
2003 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Modem system design methods are based on early system simulation using behavioral models. Since the ADC often is the critical component it is especially important that it is mode led correctly. Most current design environments use very simple ADC models such as ideal sampling and quantization to give a certain effective number of bits (ENOB). The ENOB is typically found by a single-tone test where the input is an amplitude-limited sine wave. Real applications may have inputs very different from this simple test signal and the ADC can then have a completely different performance. Detailed knowledge of the behavior in a system allows the ADC design margin to be minimized thus saving cost and power consumption.

ln the work included in this thesis an accurate model of a successive-approximation ADC is developed. It is aimed for integration into existing system simulators and can thus not be too complex or the simulation time will be unreasonably long. Measurements are performed to validate the model andcomparisons between simulated and measured data are done in both time and frequency domains. This is used to test some error hypotheses in order to find the performance limiting errors of the successive-approximation architecture.

Further, the need for accurate ADC models in system simulation is investigated. A complex model is of no use if the same information can be obtained with a simple one. To do this, the ADC model is integrated in two different systems: an ADSL modem and a radar receiver. System simulations are performed and the results are compared to the case when a simple ADC model is used. In both cases the accurate ADC model showed to be useful. System performance varied quite much for ADCs with the same specified performance in terms of ENOB depending on which error mechanism was active.

Place, publisher, year, edition, pages
Linköping: Linköping studies in science and technology, 2003. 42 p.
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1027
National Category
Engineering and Technology
urn:nbn:se:liu:diva-34806 (URN)23304 (Local ID)91-7373-689-9 (ISBN)23304 (Archive number)23304 (OAI)
2003-06-19, Sal Glashuset, Linköpings universitet, Linköping, 10:15 (Swedish)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-12-19

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