Abstract
A data-based modeling technique for amplifiers in switched capacitor circuits is presented. The measured output settling error of a switched capacitor (SC) amplifier is presented as a two-dimensional polynomial of the initial voltages in the input and output nodes of the amplifier. This fitted polynomial can then be used as a very compact behavioral discrete-time model that can replicate also the output-dependent errors of the amplifier. The procedure is illustrated by characterizing an existing amplifier and using the fitted error model of it in behavioral simulations of a pipeline A/D converter.
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