Results 11 to 20 of about 94,418 (268)

13…67 GHz Frequency Mixer

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2023
Introduction. The requirements for the performance of measuring devices, including their operating frequency, are constantly becoming stricter. This encourages the creation of wide-band microcircuits for application in microwave blocks of devices, such ...
D. S. Danilov   +5 more
doaj   +1 more source

DETERMINATION OF RESONANT ELECTRICAL CIRCUIT PARAMETERS BASED ON RESONANT FREQUENCY AND QUALITY FACTOR MEASUREMENTS

open access: yesИзмерение, мониторинг, управление, контроль, 2021
Background. The aim of the article is to develop a methodology to determine parameters of three-element resonant electric circuits based on resonant frequency and quality factor measurements. Materials and methods.
A.V. Svetlov, Ngoc Manh Nguyen
doaj   +1 more source

Design of temperature measuring circuit based on Pt100 platinum thermistor

open access: yesGong-kuang zidonghua, 2014
In view of problems of measuring error caused by line impedance and complex circuit connection existed in traditional temperature measuring method of platinum thermistor, a temperature measuring circuit based on Pt100 platinum thermistor was designed ...
YU Shuohang, LI Jianxin, HE Lin
doaj   +1 more source

Linear-Range Extension for Linear Variable Differential Transformer Using Hyperbolic Sine Function

open access: yesSensors, 2022
In this paper, a circuit technique to extend the measuring range of a linear variable differential transformer (LVDT) is proposed. The transfer characteristic of the LVDT contains the odd function form of the cubic polynomial.
Apinai Rerkratn   +3 more
doaj   +1 more source

MATHEMATICAL MODEL AND MEASURING ALGORITHM OF CONTINUALLY DISTRIBUTED SEMICONDUCTOR SENSOR OF A TEMPERATURE PROFILE IN NON-ISOTHERMAL FLOWS

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2019
: This paper proposes a mathematical model and a measuring algorithm for a semiconductor one-dimensional distributed sensor designed to measure temperature fields in non- isothermal liquid and gas flows.
Yu. K. Evdokimov   +2 more
doaj   +1 more source

A current to frequency conversion based circuit for low-level current measurement

open access: yesHe jishu, 2022
BackgroundWeak ionization current measurement is often needed in ionizing radiation detection, it is a great challenge due to extreme weak signal to be measured.
ZHAO Xu   +4 more
doaj   +1 more source

Design Interfacing circuit of measuring electric properties

open access: yesTikrit Journal of Engineering Sciences, 2005
The present paper describe the design of an interface for measuring electric conductivity of different materials. It is designed and built an interface circuit consists of three analogue / Digital converters and its accessories to engage it with ...
Aliaa S. Al- Jubair   +2 more
doaj   +1 more source

Analysis of the Operation of Cascade Current Transformers for Measurements of Short-Circuit Currents with a Non-Periodic Component with a Large Time Constant of Its Decay

open access: yesEnergies, 2022
Simulations of emergency states and tests of resistance of electrical devices to emergencies are performed in specialized high-power laboratories, the so-called short-circuit laboratories. For most electrical power devices, such measurements are required
Elzbieta Lesniewska, Jan Olak
doaj   +1 more source

A Novel Instrumentation Circuit for Electrochemical Measurements [PDF]

open access: yesSensors, 2012
In this paper, a novel signal processing circuit which can be used for the measurement of H+ ion and urea concentration is presented. A potentiometric method is used to detect the concentrations of H+ ions and urea by using H+ ion-selective electrodes and urea electrodes, respectively.
Yin, Li-Te   +3 more
openaire   +3 more sources

Design and Experiments for a Kind of Capacitive Type Sensor Measuring Air Flow and Pressure Differential

open access: yesIEEE Access, 2019
A kind of capacitive type air flow sensor is designed and fabricated for respiratory flow measurement. Major sensitive elements of the sensor are two parallel placed capacitance plates which are perpendicularly fixed on the sidewall of the air channel ...
Zhanshe Guo   +3 more
doaj   +1 more source

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