Research Article Open Access

Design of Capacitance to Voltage Converter for Capacitive Sensor Transducer

A.H.M. Zahirul Alam1, Nurul Arfah2, Sheroz Khan2 and Md. Rafiqul Islam1
  • 1 , Afganistan
  • 2 ,
American Journal of Applied Sciences
Volume 7 No. 10, 2010, 1353-1357

DOI: https://doi.org/10.3844/ajassp.2010.1353.1357

Submitted On: 14 September 2010 Published On: 31 October 2010

How to Cite: Alam, A. Z., Arfah, N., Khan, S. & Islam, M. R. (2010). Design of Capacitance to Voltage Converter for Capacitive Sensor Transducer. American Journal of Applied Sciences, 7(10), 1353-1357. https://doi.org/10.3844/ajassp.2010.1353.1357

Abstract

Problem statement: The design of Capacitance to Voltage Converter (CVC) for capacitive sensor transducer was presented. The proposed design will reduce the size, power consumption and supply voltage of the circuit and can be used in high frequency band transducer. Approach: The design was implemented using the Operational amplifier (Op amp) and capacitive network. The circuit was simulated using the PSPICE model parameters based on standard 0.13 μm CMOS process. Results: The design was able to measure a wide range of capacitance variations for the capacitive transducer. The performance analysis of the design showed desirable performance parameters in terms of response, low power consumption and a linear output voltage within the wide range of capacitive transducer capacitance variation for the power supply voltage of 1.2 V was achieved. Conclusion/Recommendations: The output voltage of the circuit varied linearly with the variation of capacitive transducer capacitance variation. The improved converter was compact and robust for integration into capacitive measuring systems and suitable for use in environment that making use of higher frequency band.

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Keywords

  • Capacitance
  • converter
  • capacitive transducer
  • sensor transducer
  • telemetry
  • measuring systems