Publication Type:

Conference Paper


Instrumentation and Measurement Technology Conference, 2009. I2MTC '09. IEEE (2009)


Analog-digital conversion, analogue-digital conversion, Capacitance, capacitive sensors, DC reference voltage, Detectors, Digital-to-frequency converters, Direct digital converter, DSADC, DSRDC, dual slope analog to digital converter, dual slope digital converter, dual slope resistance to digital converter, electric sensing devices, Electrical resistance measurement, Instrumentation and measurement, Instruments, Resistance Temperature Detector (RTD), Resistance to Digital Converter, Resistive sensor, single active element resistive sensor, Strain Gage, switching sequence, temperature sensors, Transducers, transformation constant


A direct digital converter that provides a digital output, proportional to the measurand being sensed by a single active element resistive sensor is presented in this paper. To accomplish this task, the structure and the switching sequence of a conventional dual slope, analog to digital converter (DSADC) is appropriately altered so that the altered DSADC accepts the resistance of the sensor as an integral part and provides a digital output that is linearly proportional to the physical quantity being sensed by the resistive sensor. Since the output of the dual slope resistance to digital converter (DSRDC) is dictated only by the magnitudes of a pair of DC reference voltages, a fixed value resistor and the transformation constant of the sensor, the error in the output is minimal. Hence, a high level of linearity and accuracy is achieved. Simulation studies establish the efficacy of the proposed scheme.

Cite this Research Publication

N. M. Mohan and Kumar, V. J., “Direct digital converter for a single active element resistive sensor”, in Instrumentation and Measurement Technology Conference, 2009. I2MTC '09. IEEE, 2009.