Optical transducers with frequency output

Osadchuk, А. V.; Осадчук, В. С.; Осадчук, Ярослав; Kolimoldayev, Maksat; Komada, Paweł; Mussabekov, Kanat

doi:10.1117/12.2280892

Cited by 11 publications

(7 citation statements)

References 7 publications

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“…A promising direction in the construction of gas concentration measuring transducers for respiratory diagnostics is the use of gas concentration frequency transducers based on the reactive properties of transistor structures with negative differential resistance (NDR) [162,163]. This type of transducers allows solving the problem of using analog-to-digital transducers, since it implements the method of conversion "informative signal -frequency", which is one of the best for further processing on a computer [164].…”

Section: Frequency Transducers Of Gas Concentration For the Diagnosis Of Strains Of Bacteria Helicobacter Pylorimentioning

confidence: 99%

Technical research and development

2021

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Section: Frequency Transducers Of Gas Concentration For the Diagnosis Of Strains Of Bacteria Helicobacter Pylorimentioning

confidence: 99%

Technical research and development

2021

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“…Проблематика та реалізація конвертера живлення OLED структур представлена в [10]. Проблема нестабільності та деградації параметрів OLED структур в процесі їх експлуатації представлена в [11], а питання моделювання характеристик OLED структур з врахуванням їх нестабільностей -в [12]. Корекція режимів живлення та розроблення схем компенсації дрейфу OLED структур розглянута в [13].…”

Section: постановка проблемиunclassified

“…Слід підкреслити, що реактивні властивості та від'ємний диференційний опір однозначно зв'язані між собою, а простота та багатофункціональність мікроелектронних структур з від'ємним диференційним опором є перспективним напрямком при їх створенні та практичному використанні. Застосування принципу перетворення «температура-частота» на основі наноелектронних квантових гетероструктур з від'ємним диференційним опором суттєво знижує собівартість інформаційно-вимірювальних систем, дозволяє значно зменшити масогабаритні характеристики сенсорів температури, підвищити точність і чутливість перетворення інформаційного сигналу, тобто температуру у частоту [10][11][12][13][14][15][16][17].…”

Section: вісник хмельницького національного університету №2 2021 (295) 157unclassified

Embedded System for Supply Voltage Converter of Organic Light-Emitting Diode

Barylo¹,

Helzhynskyy²,

Holyaka³

et al. 2021

Herald KhmNU

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The work is dealing with the problem of developing an embedded system for supply voltage converter of Organic Light-Emitting Diode (OLED) with advanced built-in ability to measure the volt-ampere (I – V) characteristics of structures directly during their operation. This feature is crucial in the development of a new generation of intelligent OLED controllers, which in relation to known solutions, are characterized by reduced power consumption and increased speed of periodic or continuous measurement of the I – V characteristics of OLED structures. On the basis of such measurement the drift of characteristics of OLED structures in the course of their operation is carried out, and therefore, the possibility of operative correction of their power modes is provided. The measurement of I – V characteristics of OLED structures is performed on the transients of voltage generation in the boost circuits of the drivers. To meet the requirements for such measurements, the parameters of the transient pulses must meet certain criteria. The pulse amplitude should be sufficient to scan the I – V characteristics of OLED structures in the whole range of their possible operation, and the shape and rise time should be optimal from the point of view of further detection of these I – V patterns, in particular, regarding their drift in temperature modulation or OLED structure degradation. In a number of tasks scanning and measurement of I – V characteristics should be fast enough to prevent heating, but acceptable for high-precision analog-to-digital conversion. The parameters of the pulses provide the ability to measure the thermal parameters of thermal resistance and its dependence on the duration of heating. The controller is implemented on the basis of programmable systems on the chip, namely on the PSoC 5LP.

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“…One of the new scientific directions in the construction of solid state radio-measuring transducers of gas consumption is research in the field of frequency flowmeters based on transistor structures with negative differential resistance. Solid state radio-measuring transducers of gas flow rate with a frequency output combine both simplicity and versatility that are inherent in analog devices, as well as high sensitivity, accuracy and noise immunity, which are typical for measuring transducers with a coded output signal [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The study of this scientific direction showed that the reactive properties and negative differential resistance are inextricably linked, and the multifunctionality and simplicity of radiomeasuring devices based on transistor structures with negative differential resistance is a promising direction in their construction and practical use. Also, the application of the principle of conversion "gas flow ratefrequency" based on transistor structures with negative differential resistance significantly reduces the cost of infocommunication-measuring devices and systems, and also allows to reduce the mass-dimensional characteristics of radio measuring gas flow transducers, to increase not only sensitivity, but also accuracy converting an informative signal to frequency [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Solid state radio-measuring optical-frequency transducer of gas flow rate

Osadchuk

Осадчук

et al. 2021

Phys. Chem. Solid St.

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The paper presents a study of a solid state radio-measuring optical-frequency transducer of gas consumption based on a transistor structure with a negative differential resistance. A mathematical model of a solid state radio-measuring optical-frequency flowmeter was developed, which made it possible to obtain the conversion function and the sensitivity equation. The solid state radio-measuring optical-frequency gas flowmeter is based on a transistor structure with a negative differential resistance, consisting of a HEMT field-effect transistor and a bipolar transistor with a passive inductive element. When replacing the passive inductance with an active inductive element, the transducer can be completely integrated. The negative differential resistance formed by the parallel connection of the impedance with the capacitive component on the collector-drain electrodes of the transistor structure and inductance leads to the occurrence of electrical oscillations in the oscillator circuit. Theoretical and experimental studies have shown that with an increase in gas consumption from 0 l/h to 4 l/h, the generation frequency decreases from 812.65 MHz to 811.62 MHz at a supply voltage of 3.3 V, and at a supply voltage of 3.8 V from 813.00 MHz to 811.80 MHz. It is shown that by choosing a constant voltage power supply mode, it is possible to obtain an almost linear dependence of the generation frequency on the gas flow rate and choose channels for transmitting measurement information. The obtained theoretical and experimental studies are in good agreement, the relative error does not exceed 2.5 %.

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Optical transducers with frequency output

Cited by 11 publications

References 7 publications

Technical research and development

Technical research and development

Embedded System for Supply Voltage Converter of Organic Light-Emitting Diode

Solid state radio-measuring optical-frequency transducer of gas flow rate

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