Comparative analysis of promising current sources for electrical impedance tomography in an extended frequency range
DOI:
https://doi.org/10.20535/RADAP.2012.51.115-121Keywords:
impedance tomography, current source, complex resistance, Howland circuit, phase shift, the active feedbackAbstract
Iintroduction: Features of biological impedance meters are listed and requirements for their current sources are formed. Formulation of the problem: A review of existing current sources and puts forward proposals to explore the parameters of some of them and the current source on a fully integrated differential amplifier with active feedback. Methods of research and analysis of the results: Describes the method of measuring the parameters of current sources, critically reviewed the results and recommendations for the use of these sources. Conclusion: The accomplishments and weaknesses of the investigated sources, given ways to improve their parameters are considered.
References
Література
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