FPGA Based Excitation Source in Biomedical Electrical Impedance Tomography System

Xiao Yan Chen; Jia Ni Wu

doi:10.4028/www.scientific.net/AMM.48-49.537

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 48-49FPGA Based Excitation Source in Biomedical...

FPGA Based Excitation Source in Biomedical Electrical Impedance Tomography System

Abstract:

An excitation source for biomedical electrical impedance tomography system based on FPGA is designed and implemented with 33 KHz bandwidth and adjustable phases. Codes are programmed with PicoBlaze instructions by Notepad++, and compiled to user programs by KCPSM3 assembler. Digital-analog conversion is carried out in interruption subroutine, the output digital signals are sampled at the setting frequency and filtered by a second-order Butterworth low-pass filter. The proposed method offers a novel effective and feasible approach to satisfy the requirements of excitation source in bioelectrical impedance tomography system.

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Periodical:

Applied Mechanics and Materials (Volumes 48-49)

Pages:

537-540

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.48-49.537

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Online since:

February 2011

Authors:

Xiao Yan Chen, Jia Ni Wu

Keywords:

Butterworth Filter, Electrical Impedance Tomography (EIT), Excitation Source, Field-Programmable Gate Array (FPGA)

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