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12 June 2020 Optical-frequency gas flow meter on the basis of transistor structures with negative differential resistance
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Proceedings Volume 11456, Optical Fibers and Their Applications 2020; 114560F (2020) https://doi.org/10.1117/12.2569771
Event: Optical Fibers and Their Applications 2020, 2020, Bialowieza, Poland
Abstract
The article investigated the optical-frequency gas flow meter based on a transistor structure with negative differential resistance (NDR). A schematic diagram and design of an optical-frequency gas flow transducer that operates in the microwave range (0.85 to 1.5 GHz), which consists of a bipolar and field-effect transistor with a Schottky barrier, is proposed as a photosensitive element using a photoresistor. A mathematical model of an optical-frequency gas flow meter based on a transistor structure with negative differential resistance has been developed, which allows one to obtain the main characteristics of the transducer in a wide frequency range. Theoretically and experimentally, the possibility of controlling both the reactive component and the negative differential resistance from changes in control voltage and power is shown, it extends the functionality of optical transducers and allows linearization of the conversion function within (0.1 - 0.2)%. Experimental studies have shown that the greatest sensitivity and linearity of the conversion function of an opticalfrequency gas flow transducer lies in the range from 3 V to 3.5 V. The sensitivity of the developed optical-frequency gas flow transducer based on a transistor structure with NDR is 146 kHz/liter/hour, and the measurement error is ± 1.5%.
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander V. Osadchuk, Volodymyr S. Osadchuk, Iaroslav O. Osadchuk, Nataliia V. Titova, Olga Yu. Pinaeva, Piotr Kisała, Saule Rakhmetullina, Aliya Kalizhanova, and Zhanar Azeshova "Optical-frequency gas flow meter on the basis of transistor structures with negative differential resistance", Proc. SPIE 11456, Optical Fibers and Their Applications 2020, 114560F (12 June 2020); https://doi.org/10.1117/12.2569771
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