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Cascade ΣΔ modulator with digital correction for finite amplifier gain effects

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2 Author(s)
G. Leger ; Inst. de Microelectron. de Sevilla, Spain ; A. Rueda

A simple and fully digital solution to correct the effect of amplifier finite gain in cascade ΣΔ modulators is presented. The main contribution of this study is a simple digital method to evaluate the integrator pole errors, which are further taken into account to modify the reconstruction filter. The method is applied to a 2-1 cascade modulator.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 21 )