The mathematical model of frequency gas transducer based on transistor structure with NDR for diagnosis of helicobacter pylori strains

Alexander V. Osadchuk; Neonila I. Osadchuk; Iaroslav A. Osadchuk; Olena O. Seletska; Oleksandr V. Kobylianskyi; Paweł Komada; Yedilkhan Amirgaliyev

doi:10.1117/12.2536850

6 November 2019 The mathematical model of frequency gas transducer based on transistor structure with NDR for diagnosis of helicobacter pylori strains

Alexander V. Osadchuk, Neonila I. Osadchuk, Iaroslav A. Osadchuk, Olena O. Seletska, Oleksandr V. Kobylianskyi, Paweł Komada, Yedilkhan Amirgaliyev

Author Affiliations +

Proceedings Volume 11176, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019; 111762T (2019) https://doi.org/10.1117/12.2536850
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019, 2019, Wilga, Poland

Abstract

The paper studies a frequency transducer of the gas concentration for detection of Helicobacter Pylori strains based on the MOSFET-bipolar transistor structure with a negative differential resistance and a highly sensitive NH₃ sensor. A dynamic mathematical model of the frequency transducer of gas concentration has been developed using the state variable method which makes it possible to determinate the value of voltage or current at any point of the circuit at any particular time when the gas concentration is changed. Analytical expressions for transfer function and sensitivity equation have been obtained on the basis of the nonlinear equivalent circuit of the frequency gas concentration transducer. Sensitivity of the developed device for detecting Helicobacter Pylori strains is from 2.1 kHz/ppm to 3.4 kHz/ppm.

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Alexander V. Osadchuk, Neonila I. Osadchuk, Iaroslav A. Osadchuk, Olena O. Seletska, Oleksandr V. Kobylianskyi, Paweł Komada, and Yedilkhan Amirgaliyev "The mathematical model of frequency gas transducer based on transistor structure with NDR for diagnosis of helicobacter pylori strains", Proc. SPIE 11176, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2019, 111762T (6 November 2019); https://doi.org/10.1117/12.2536850

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