Architecture of an on Electrode Integrated Electronics with an All Digital Interface for Electrical Impedance Tomography

摘要

The paper presents an architecture of an EIT system aiming to deploy on each electrode the analog part electronics aggregated in an integrated circuit. The main objective is to have outside the electrodes belt an all digital interface only. The on electrode integrated circuit as proposed incorporates all stages. The sine wave generation, D/A converter and filter, a high resistance output voltage to current converter to the associated digital communication and control on the input side. The sensing side will contribute with the differential voltage measurement module. The paper examines in detail solutions for the frequency generation module and the current generator at the output. The results of the design optimization for integration into silicon are emphasized. Future work is outlined in the conclusions.