WAVE-FORM GENERATOR FOR ELECTRICAL-IMPEDANCE TOMOGRAPHY (EIT) USING LINEAR INTERPOLATION WITH MULTIPLYING D A CONVERTERS/

Authors
BLAD B JOHANNESSON J JOHNSSON G BACHMAN B LINDSTROM K
Citation
B. Blad et al., WAVE-FORM GENERATOR FOR ELECTRICAL-IMPEDANCE TOMOGRAPHY (EIT) USING LINEAR INTERPOLATION WITH MULTIPLYING D A CONVERTERS/, Journal of medical engineering & technology, 18(5), 1994, pp. 173-178
Citations number
9
Categorie Soggetti
Engineering, Biomedical
Journal title
Journal of medical engineering & technology → ACNP
ISSN journal
03091902
Volume
18
Issue
5
Year of publication
1994
Pages
173 - 178
Database
ISI
SICI code
0309-1902(1994)18:5<173:WGFET(>2.0.ZU;2-L
Abstract
This paper describes the implementation of a multiplying digital-to-an alogue (D/A) converter as a Programmable waveform generator to be used in an electrical impedance tomography (EIT) system. Different digital techniques of generation waveforms are considered and the advantages and disadvantages of the chosen slope-plus-peedestal technique are Pre sented. A wire-wrapped protoype system has been designed, and from mea sured frequency spectra the total harmonic distortion can be calculate d to values between 1.1 and 2.9% depending on frequency.