Title :
Nonlinearity of Gm-C in bandpass sigma-delta modulators
Author :
Benabes, P. ; Keramat, M. ; Gauthier, A. ; Kielbasa, R.
Author_Institution :
Ecole Superieure d´´Electr., Gif-sur-Yvette, France
Abstract :
In this paper, an analysis of nonlinearity in Gm-C filters for bandpass sigma-delta modulators is proposed. Only small cubic non-linear terms are considered. It results in a very simple model of nonlinear resonators. Modeling of an eighth order modulator is also presented. This model is used to predict resonators non-linear effects on the output of a bandpass ΣΔ modulator
Keywords :
active filters; resonator filters; sigma-delta modulation; Gm-C resonator filter; bandpass sigma-delta modulator; eighth-order modulator; nonlinearity; Analog-digital conversion; Band pass filters; Delta-sigma modulation; Linearity; Predictive models; Resonator filters; Sampling methods; Switched capacitor circuits; Transconductance; Very large scale integration;
Conference_Titel :
Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on
Conference_Location :
Lansing, MI
Print_ISBN :
0-7803-6475-9
DOI :
10.1109/MWSCAS.2000.951584
