IEICE Electronics Express
Online ISSN : 1349-2543
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Bridge resistance deviation-to-period converter with high linearity
Won-Sup ChungChang-Su WonHoon Kim
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JOURNALS FREE ACCESS

2009 Volume 6 Issue 23 Pages 1663-1668

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Abstract

A bridge resistance deviation-to-period (BRD-to-P) converter is presented for interfacing resistive sensor bridges. It consists of a linear operational transconductance amplifier (OTA) and a current-controlled oscillator (CCO) formed by a current-tunable Schmitt trigger and an integrator. The free running period of the converter is 1.824ms when the bridge offset resistance is 1kΩ. The conversion sensitivity of the converter amounts to 3.814ms/Ω over the resistance deviation range of 0-1.2Ω. The linearity error of the conversion characteristic is less than ±0.004%.

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© 2009 by The Institute of Electronics, Information and Communication Engineers
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