Non-linear dynamic modelling of broad-band GHz-field analogue-to-digital acquisition channels |
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Authors: | Pier Andrea Traverso Marco Salami Gaetano Pasini Fabio Filicori |
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Affiliation: | 1. DEIS – Department of Electronics, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy;2. DIE – Department of Electrical Engineering, University of Bologna, Italy |
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Abstract: | In this paper the Discrete-Time Convolution Model behavioural approach is proposed for the characterization/empirical modelling of high-performance broad-band A/D channels or stand-alone A/D converters, designed for the acquisition of signals up to the field of microwaves. Thanks to its inherent capability of separately describing all the non-idealities of different nature within the channel, and in particular the non-linear dynamic effects, the method is particularly suitable for the A/D channels implemented in modern high-frequency instrumentation and RF receiver architectures. In this framework, the experimental procedures devoted to the extraction of model parameters have been re-designed in order to allow for the application of the approach without the need for higher-performance reference A/D devices. Experimental results are provided, which validate the analytical/functional formulation of the method and the related measurement procedures/set-ups, for a state-of-the-art, 1-GHz analogue bandwidth 1-GSa/s A/D acquisition channel space-qualified for satellite radar applications. |
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Keywords: | Analogue-to-digital converter (ADC) Behavioural model Dynamic non-linearity High-frequency applications |
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