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Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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A Resistance Deviation-To-Time Interval Converter Based On Dual-Slope Integration

  • Shang, Zhi-Heng (Dept. of Semiconductor Engineering, Cheongju University) ;
  • Chung, Won-Sup (Dept. of Semiconductor Engineering, Cheongju University) ;
  • Son, Sang-Hee (Dept. of Semiconductor Engineering, Cheongju University)
  • Received : 2015.08.25
  • Accepted : 2015.11.05
  • Published : 2015.12.31
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Abstract

A resistance deviation-to-time interval converter based on dual-slope integration using second generation current conveyors (CCIIs) is designed for connecting resistive bridge sensors with a digital system. It consists of a differential integrator using CCIIs, a voltage comparator, and a digital control logic for controlling four analog switches. Experimental results exhibit that a conversion sensitivity amounts to $15.56{\mu}s/{\Omega}$ over the resistance deviation range of $0-200{\Omega}$ and its linearity error is less than ${\pm}0.02%$. Its temperature stability is less than $220ppm/^{\circ}C$ in the temperature range of $-25-85^{\circ}C$. Power dissipation of the converter is 60.2 mW.

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References

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