Proceedings ArticleDOI
A modified Direct Digital Converter for resistive sensors in bridge form
R. N. Ponnalagu,Boby George,V. Jagadeesh Kumar +2 more
- pp 1-6
TLDR
In this paper, a modified DDC that can tolerate mismatch between the four sensing elements of a bridge type resistive sensor is presented. But, the worst case error observed from the improved DDC scheme is only ± 0.24%.Abstract:
Direct Digital Converter (DDC) suitable for resistive sensor elements connected in the form of bridge provides a digital output proportional to quantity being sensed. However, such a DDC requires that all the four sensor elements are to be identical. If there is a mismatch between the sensor elements (nominal values of the four resistances not equal) the error in the output of the DDC increases drastically. We now present a modified DDC that can tolerate mismatch between the four sensing elements of a bridge type resistive sensor. While the worst case error observed from the conventional DDC scheme rises from ± 0.07% to ± 1.32 % (simulation studies) for a very low mismatch of 0.03 %, the worst case error observed from the improved DDC scheme proposed here is only ± 0.24%.read more
Citations
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Proceedings ArticleDOI
Analog and Direct-Digital Front-End Circuits Suitable for Low-Valued Resistive Sensors
TL;DR: Two simple and efficient electronic front-ends suitable for low-valued resistive sensors are presented and were shown to possess fair performance parameters (linearity, zero offset, etc.).
References
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Load cells in force sensing analysis -- theory and a novel application
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