Journal ArticleDOI
A linear resistance-to-time converter with high resolution
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TLDR
In this paper, a resistance-to-time converter employing a bridge amplifier, an integrator and a comparator is described, which has a resolution and linearity of the same order as that of a recently reported R2F converter.Abstract:
A resistance-to-time converter employing a bridge amplifier, an integrator and a comparator is described. While possessing a resolution and linearity of the same order as that of a recently reported resistance-to-frequency converter, the present circuit has the advantage of grounded detecting resistance. Further, no compensation arrangement need be incorporated for maintaining wide-range linearity.read more
Citations
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Journal ArticleDOI
Improved Single-Element Resistive Sensor-to-Microcontroller Interface
TL;DR: A direct sensor-to-microcontroller interface scheme that compensates the effect due not only to resistances of lead wires but also the effect of microcontroller port pin’s internal resistance and any offset present in those pins is presented in this paper.
Journal ArticleDOI
Relaxation Oscillator-Based Active Bridge Circuit for Linearly Converting Resistance to Frequency of Resistive Sensor
TL;DR: In this article, an easily implementable signal conditioning circuit for resistive humidity and temperature sensors is presented based on a relaxation oscillator in which both the frequency and the duty-cycle of the square-wave output signal simultaneously carry information from two different types of sensors.
Journal ArticleDOI
Analysis of Power-Supply Interference Effects on Direct Sensor-to-Microcontroller Interfaces
TL;DR: Experimental data obtained from a PIC microcontroller agree with the theoretical predictions and the effects of power-supply interference on direct sensor-to-microcontroller interfaces based on measuring the charging/discharging time of an RC circuit that includes the sensor are analyzed.
Journal ArticleDOI
Linearization of NTC Thermistor Characteristic Using Op-Amp Based Inverting Amplifier
TL;DR: In this article, a low cost linearizing circuit was developed, placing the NTC thermistor in a widely used inverting amplifier circuit using operational amplifier, achieving a linearity of approximately ± 1% over 30 °C -120 °C.
Journal ArticleDOI
Analysis of a Sigma–Delta Resistance-to-Digital Converter for Differential Resistive Sensors
TL;DR: A direct resistance-to-digital converter (RDC) that is suitable for differential resistive sensors is proposed and analyzed and shows that the proposed RDC has negligible sensitivity to variations in circuit parameters.
References
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Journal ArticleDOI
A high-resolution, linear resistance-to-frequency converter
K. Mochizuki,Kenzo Watanabe +1 more
TL;DR: In this article, a resistance-to-frequency converter consisting of a Wheatstone bridge followed by an integrator and a comparator is described, whose frequency changes linearly with a resistance change detected by the bridge.
Journal ArticleDOI
Highly accurate resistance deviation to frequency converter with programmable sensitivity and resolution
C. D. Johnson,H. Al Richeh +1 more
TL;DR: In this paper, a circuit based on a DC bridge is presented which allows for highly accurate and linear conversion of resistance deviation to frequency, and a test of the converter demonstrates that sensitivities of 1 part in 105 are obtained using standard electronic components.
Proceedings ArticleDOI
A novel low-cost and accurate multiple-purpose sensor interface with continuous autocalibration
TL;DR: In this paper, a general-purpose sensor interface has been designed and fabricated in an 0.7 /spl mu/m CMOS process with an accuracy of 10-15 bits and a resolution of 16 bits.