A differential readout circuit for tin oxide gas sensor array

B. Guo, Amine Bermak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A novel differential readout circuit (DRC) for tin oxide gas sensors is proposed. The DRC consists of a differential readout unit (DRU), a voltage shifter (VS) and an instrumental amplifier. The DRU applies a constant current to drive the sensor and uses a unit-gain single stage amplifier (inverter) to generate the fully differential output, directly from the voltage drop across the sensor. By tuning the biasing current of the voltage shifter, the DRC can compensate for the sensor's baseline and its drift. The output of the DRC is simply proportional to the difference between the sensing signal and the baseline. Simulation results show that the DRC can sense and amplify 0-20MΩ sensor's resistance variation, which is often encountered in gas sensor applications. The output presents a linear dependence with the resistance variation of the sensor over the entire dynamic region. The proposed DRC provides increased signal to noise ratio over conventional single-ended voltage divider readout methods.

Original languageEnglish
Title of host publication2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC
Pages635-638
Number of pages4
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC - Howloon, Hong Kong
Duration: 19 Dec 200521 Dec 2005

Other

Other2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC
CountryHong Kong
CityHowloon
Period19/12/0521/12/05

Fingerprint

Sensor arrays
Tin oxides
Chemical sensors
Networks (circuits)
Sensors
Voltage dividers
Electric potential
stannic oxide
Signal to noise ratio
Tuning

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Guo, B., & Bermak, A. (2006). A differential readout circuit for tin oxide gas sensor array. In 2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC (pp. 635-638). [1635354] https://doi.org/10.1109/EDSSC.2005.1635354

A differential readout circuit for tin oxide gas sensor array. / Guo, B.; Bermak, Amine.

2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC. 2006. p. 635-638 1635354.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Guo, B & Bermak, A 2006, A differential readout circuit for tin oxide gas sensor array. in 2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC., 1635354, pp. 635-638, 2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC, Howloon, Hong Kong, 19/12/05. https://doi.org/10.1109/EDSSC.2005.1635354
Guo B, Bermak A. A differential readout circuit for tin oxide gas sensor array. In 2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC. 2006. p. 635-638. 1635354 https://doi.org/10.1109/EDSSC.2005.1635354
Guo, B. ; Bermak, Amine. / A differential readout circuit for tin oxide gas sensor array. 2005 IEEE Conference on Electron Devices and Solid-State Circuits, EDSSC. 2006. pp. 635-638
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