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This paper presents a performance analysis of a system for electrochemical impedance spectroscopy (EIS). The system, composed by an analog front-end (AFE) and a custom microcontroller (MCU) board, performs the impulse response (IR) measurement of linear and time-invariant (LTI) systems with pseudo-random excitation signals. As a novelty, a specific AFE for the interfacing of two-terminal resistive and capacitive sensors is covered in detail. The paper proposes, for the first time, a mathematical model to predict the impact of the main noise sources in the measured IR. Thanks to the proposed approach, the AFE and the system’s parameters can be properly designed in order to reduce the error, thus, minimizing the energy-per-error figure of merit (FOM) as well. The AFE is realized as discrete-components circuit and it has been included in a custom MCU-based measurement system as an expansion module. The …
Publication date: 
30 May 2022

Antonio Vincenzo Radogna, Simonetta Capone, Luca Francioso, Pietro Aleardo Siciliano, Stefano D’Amico

Biblio References: 
Volume: 69 Issue: 9 Pages: 3666-3678
IEEE Transactions on Circuits and Systems I: Regular Papers