Proceedings Article10.1109/CAS50358.2020.9268006
Smart-Sensing Interface for Chemo-Resistive Sensor Based on a Wheatstone Quarter-Bridge
Matei Serbanescu,Vlad-Mihai Placinta,Octavian Buiu,Gheorghe Pristavu,Florin Nastase,Bogdan-Catalin Serban +5 more
- 07 Oct 2020
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TL;DR: This paper presents the architecture of a signal-conditioning circuit designed for resistive sensors and based on the properties of a Wheatstone quarter-bridge, designed using NI Multisim software and found to have less than 0.5 % non-linearity relative error.
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Abstract: This paper presents the architecture of a signal-conditioning circuit designed for resistive sensors and based on the properties of a Wheatstone quarter-bridge. The bridge comprises one sensing element, consisting of a small-resistance-variation sensor and three fixed resistors. The proposed circuit was designed using NI Multisim software; simulations were carried out for various scenarios in order to ensure maximum accuracy versus component values and tolerances. The output signal of the proposed circuit was found to have less than 0.5 % non-linearity relative error for a sensing element value variation of 3 ohms.
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Citations
Design of a Chemoresistive Sensor Array for Potential Smart Agriculture Applications
C. Pachiu,O. Simionescu,B. Serban,C. Parvulescu,R. Marinescu,N. Dumbravescu,F. Negoita,R. Popa,O. Buiu,M. Serbanescu,Gh. Pristavu,Gh. Brezeanu +11 more
- 28 Mar 2023
TL;DR: Design and optimization of nanocrystalline CVD based graphene layers for chemoresistive sensor applications.
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A Linearizing Digitizer for Wheatstone Bridge Based Signal Conditioning of Resistive Sensors
TL;DR: A novel signal conditioning scheme, which provides a linear-digital output directly from the resistive sensor(s) that are connected in such bridge configurations, and drastically reduces the effect on the output due to the lead wires that connect the Wheatstone bridge and the DSADC.
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Analog Wheatstone bridge-based automatic interface for grounded and floating wide-range resistive sensors
TL;DR: In this article, the authors present a suitable use of Wheatstone bridge-based circuits to employ a novel interface for both grounded and floating wide range resistive sensor estimation, which allows automatic and continuous detection and quantification of the sensor resistance.
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An Improved Direct Digital Converter for Bridge-Connected Resistive Sensors
TL;DR: In this article, an improved direct digital converter (IDDC) suitable for bridge-connected resistive sensors is presented, where the input stage of a dual-slope analog-to-digital converter is altered to accommodate a resistive sensor bridge, as its integral part and the logic of conversion incorporate automatic compensation for offset, offset drift and gain errors.
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