Title :
Cascade ΣΔ modulator with digital correction for finite amplifier gain effects
Author :
Leger, G. ; Rueda, A.
Author_Institution :
Inst. de Microelectron. de Sevilla, Spain
Abstract :
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.
Keywords :
amplifiers; cascade networks; error correction; integrating circuits; modulators; sigma-delta modulation; signal reconstruction; cascade sigma-delta modulators; digital correction; finite amplifier gain effects; integrator pole errors; reconstruction filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20046388
