A bridge resistance deviation-to-time interval converter for resistive sensor bridges

Hoon Kim; Won-Sup Chung; Sang-Hee Son; Hee-Jun Kim

doi:10.1587/elex.4.326

LETTER

A bridge resistance deviation-to-time interval converter for resistive sensor bridges

Hoon Kim, Won-Sup Chung, Sang-Hee Son, Hee-Jun Kim

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Keywords: resistive bridge sensor, resistive bridge circuit, bridge resistance deviation-to-time interval converter

JOURNAL FREE ACCESS

2007 Volume 4 Issue 10 Pages 326-331

DOI https://doi.org/10.1587/elex.4.326

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Abstract

A bridge resistance deviation-to-time interval converter is presented for interfacing resistive sensor bridges. It consists of two voltage-to-current converters, two current-tunable Schmitt triggers, a ramp integrator, and two logic gates. A prototype circuit built using discrete components exhibits a conversion sensitivity amounting to 4527.8µs/Ω over the resistance deviation range of 0-2Ω and a linearity error less than ± 0.01%.

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