ADVANCED MODELING AND DESIGN EVALUATION PROCEDURE APPLIED TO PIPELINED A/D CONVERTER

Petr Struhovský, Ondřej Šubrt, Jiří Hospodka, Pravoslav Martinek

Abstract

This paper deals with a prospective approach of modeling and design evaluation applied to pipelined A/D converter architecture. In contrast with conventional ADC modeling algorithms targeted to extract the maximum ADC nonlinearity error, the innovative approach presented allows to decompose magnitudes of individual error sources from a measured or simulated response of an ADC device. This qualitative decomposition can significantly contribute to the ADC calibration procedure performed in term of integral and differential non-linearity. This is backgrounded by the fact that the knowledge of ADC performance contributors provided by the proposed method helps to adjust the values of on-chip converter components so as to equalize (and possibly minimize) the total non-linearity error. The proposed procedure is demonstrated on a system design example of pipelined A/D converter. Simulation results of each stage of the design evaluation process are given, starting from the INL performance extraction proceeded in a powerful Virtual Testing Environment and finishing by an error source simulation and modeling of pipelined ADC structure, suitable for a generic process flow.

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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