Temperature compensation of Wheatstone bridge magnetoresistive sensors based on generalized impedance converter with input reference current

Muñoz, David; Moreno, J. Sánchez; Berga, Silvia Casans; Montero, E. Castro; Reig, C.; Antón, A. Edith Navarro

doi:10.1063/1.2358696

Cited by 17 publications

(7 citation statements)

References 14 publications

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“…Usually finite frequency of the crossover frequency f c is considered as some non-ideality of an OpAmp but the purpose of the present paper is to demonstrate that this inequality can be used for something useful, to design and create tunable high-Q resonators for various applications. [25][26][27][28] In other words, the novelty of the proposed scheme is based on the immanent property of the operational amplifiers -the finite crossover frequency f c . Recently we have also developed a method for fast and accurate measurement of the crossover frequency of operational amplifiers.…”

mentioning

confidence: 99%

Tunable high-Q resonator by general impedance converter

Mifune

Mishonov

Serafimov

et al. 2021

Review of Scientific Instruments

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A tunable high-Q resonator is performed in the schematics of the General Impedance Converter (GIC). In the framework of frequency dependent open-loop gain of operational amplifiers, a general formula of the frequency dependence of the impedance of GIC is derived. The explicit formulas for the resonance frequency and Q-factor include as an immanent parameter the crossover frequency of the operational amplifier. Voltage measurements of GIC with a lock-in amplifier perfectly agree with the derived formulas.

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confidence: 99%

Tunable high-Q resonator by general impedance converter

Mifune

Mishonov

Serafimov

et al. 2021

Review of Scientific Instruments

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“…The conventional full-bridge circuit itself can also be modified to improve temperature compensation and reduce thermal drift output. Non-invasive bridge manipulation techniques involve the addition of different circuit elements to the full-bridge system, whereas invasive techniques require the modification of the initial bridge elements (Munoz et al 2006). Furthermore, several studies have improved temperature compensation in their measurements by implementing not one, but two bridge circuits in their experiments.…”

Section: Full-bridge Circuitsmentioning

confidence: 99%

Sensing sheet: the response of full-bridge strain sensors to thermal variations for detecting and characterizing cracks

Tung¹,

Glišić²

2016

Meas. Sci. Technol.

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Sensing sheets based on large-area electronics consist of a dense array of unit strain sensors. This new technology has potential for becoming an effective and affordable monitoring tool that can identify, localize and quantify surface damage in structures. This research contributes to their development by investigating the response of full-bridge unit strain sensors to thermal variations. Overall, this investigation quantifies the effects of temperature on thin-film full-bridge strain sensors monitoring uncracked and cracked concrete. Additionally, an empirical formula is developed to estimate crack width given an observed strain change and a measured temperature change. This research led to the understanding of the behavior of full-bridge strain sensors installed on cracked concrete and exposed to temperature variations. It proves the concept of the sensing sheet and its suitability for application in environments with variable temperature.

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“…Meanwhile, the hardware method has advantages in real-time perform sensor with simple temperature drift behavior, the hardware method has advantages in real-time. Other research groups have reported the temperature dependence and compensation methods for AMR devices with Wheatstone bridge (Kim et al , 2000; Ripka et al , 2003; Ramirez Munoz et al , 2006; Vopalensky and Platil, 2013; Harmon et al , 2015), and there is still no relevant work on spin-valve sensor. In this paper, the temperature properties of spin-valve sensor are thoroughly investigated, and experimental results and compensation technique are presented.…”

Section: Introductionmentioning

confidence: 99%

Temperature relevant performance and calibration of spin-valve sensor

Zhu

Qian

Zhang

et al. 2019

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Purpose It has been noted that the spin-valve sensor exhibits lower sensitivity with higher temperature because of the variation of GMR ratio, which could lead to the measurement error in applications where working temperature changes largely over seasons or times. This paper aims to investigate and compensate the temperature effect of the spin-valve sensor. Design/methodology/approach A spin-valve sensor is fabricated based on microelectronic process, and its temperature relevant properties are investigated, in which the transfer curves are acquired within a temperature range of −50°C to 125°C with a Helmholtz coil and temperature chamber. Findings It is found that the sensitivity of spin-valve sensor decreases with temperature linearly, where the temperature coefficient is calculated at −0.25 %/°C. The relationship between sensitivity of spin-valve sensor and temperature is well-modeled. Originality/value The temperature drift model of the spin-valve sensor’s sensitivity is highly correlated with tested results, which could be used to compensate the temperature influence on the sensor output. A self-compensation sensor system is proposed and built based on the expression modeled for the temperature dependence of the sensor, which exhibits a great improvement on temperature stability.

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Temperature compensation of Wheatstone bridge magnetoresistive sensors based on generalized impedance converter with input reference current

Cited by 17 publications

References 14 publications

Tunable high-Q resonator by general impedance converter

Tunable high-Q resonator by general impedance converter

Sensing sheet: the response of full-bridge strain sensors to thermal variations for detecting and characterizing cracks

Temperature relevant performance and calibration of spin-valve sensor

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