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Simple Interface for Resistive Sensors Based on Pulse Width Modulation.
- Source :
-
IEEE Transactions on Instrumentation & Measurement . Nov2013, Vol. 62 Issue 11, p2983-2992. 10p. - Publication Year :
- 2013
-
Abstract
- A resistance to pulse width converter with improved stability and temperature compensation is described. The converter is therefore suited as a signal conditioner for resistive sensors. The sensor interface is based on a multivibrator in monostable or astable configuration and combines the single point calibration used in direct sensor-to-microcontroller interface. Analyses show that a resolution better than 14.2 b (for 20 MHz time base) with maximal relative error of 0.11% in the range 1000–3000 \Omega is achievable. In this paper, a comparative analysis in terms of measuring uncertainty, speed, and resolution between the multivibrator in monostable and astable operation is performed. A method for defining optimal time constant that results in best speed/resolution trade-off is proposed. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00189456
- Volume :
- 62
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Instrumentation & Measurement
- Publication Type :
- Academic Journal
- Accession number :
- 90678157
- Full Text :
- https://doi.org/10.1109/TIM.2013.2266025