Title :
A novel optimization method for CT sigma-delta-modulators using a switched system model
Author :
Zorn, Christoph ; Stegemann, Sebastian ; Brucknery, T. ; Ortmannsy, M. ; Mathis, Wolfgang
Author_Institution :
Inst. of Theor. Electr. Eng., Leibniz Univ. of Hanover, Hanover, Germany
Abstract :
This paper presents an approach to analyse the stability of continuous time ΣΔ data converters and shows a new method to define optimized parameter sets without a large number of simulations. Thereby the converter is described as a switched system. The presented analysis is based on a state space description which is utilized to express the properties of a stable behaviour. It is shown how the analysis method can be used to optimize the filter coefficients of the modulator by scaling the integrators outputs.
Keywords :
circuit optimisation; data conversion; integrating circuits; sigma-delta modulation; CT sigma-delta-modulator; continuous time ΣΔ data converter; filter coefficient; integrator output; novel optimization method; state space description; switched system model; Equations; Mathematical model; Modulation; Signal to noise ratio; Switched systems; Switches; Trajectory;
Conference_Titel :
Circuits and Systems (ISCAS), 2011 IEEE International Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4244-9473-6
Electronic_ISBN :
0271-4302
DOI :
10.1109/ISCAS.2011.5937946
