A novel time-controlled interface circuit for resistive sensors

Marcellis, Andrea De; Ferri, Giuseppe; Depari, A.; Flammini, A.

doi:10.1109/icsens.2011.6127099

Cited by 9 publications

(4 citation statements)

References 17 publications

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“…Due to their wide input resistance range, designing an electronic interface circuit for resistive sensors is considered as a challenging task [7], [11], and [13]. Over the years, various techniques were proposed to measure electrically a gas change.…”

Section: Proposed Methods a Resistance To Time Conversionmentioning

confidence: 99%

“…Therefore, the transducer of the sensor converts the chemical information about the concentration of the gas in the atmosphere into an electrical signal, which is a variation of resistance. Such sensors show a wide range performance since the baseline resistance depends on several chemical and physical parameters, fabrication process, technology, and the sensor operating conditions [11].…”

Section: Readout Electronic Interfacementioning

confidence: 99%

“…Quasi-digital electronic interface circuits based on enhanced oscillator approach in which the information about the sensor is converted into duty cycle, frequency, or period represent an effective solution since it is possible to merge the ingrained simplicity to analog devices with the accuracy and noise immunity typical of digital sensors [14]. Therefore, our proposed approach takes advantage of the resistance-to-time conversion technique, which is advisable when wide-range resistances are to be considered [7], [11], and [14]. This paper focuses on the implementation of the resistance to current conversion circuit, which is an essential part to achieve the overall readout conversion accuracy.…”

Section: Readout Electronic Interfacementioning

confidence: 99%

See 2 more Smart Citations

Design and Reliability Analysis of Differential Resistance to Current Conversion Circuit for Biomedical Application of Gas Sensing

Hijazi¹,

Caviglia²,

Chiblé³

et al. 2017

IJCATR

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Gas sensing in biomedical applications shows a conversion of the concentration of the exhaled gas to a variation in resistance, so an electronic integrated interface circuit is required to analyse the exhaled gases, which are indications for many diseases. In this paper, a resistance to current conversion circuit based on differential biasing for Electronic nose (E-nose) breath analyser is presented. Over more than 5-decades (500Ω to 100MΩ) input resistance range, a precision, less than 1%, required by novel gas sensing system in portable applications, is preserved. Therefore, the proposed circuit obtains high accuracy under simulation. The outputs of the proposed Resistance to Current (R-to-I) conversion circuit achieve a percentage error below 0.25% under environment corners. The reliability of the proposed circuit is also investigated under the effect of process variations. In order to assess the correctness of the proposed architecture, the circuit was compared to similar solutions presented in literature where the proposed architecture attains a worst-case percentage error of 0.05%.

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Section: Proposed Methods a Resistance To Time Conversionmentioning

confidence: 99%

Section: Readout Electronic Interfacementioning

confidence: 99%

Section: Readout Electronic Interfacementioning

confidence: 99%

See 1 more Smart Citation

Design and Reliability Analysis of Differential Resistance to Current Conversion Circuit for Biomedical Application of Gas Sensing

Hijazi¹,

Caviglia²,

Chiblé³

et al. 2017

IJCATR

View full text Add to dashboard Cite

show abstract

“…In the presence of targeted analyte, such sensors have the role to convert the chemical changes about the concentration of the gas in the atmosphere into an electrical signal in the form of a variation of resistance. The sensors resistance Rsens varies across several decades [5]. An accurate voltage to current conversion is required to fix the voltage across the sensor, so that, the variation of the resistance is changed into a current signal guaranteeing an accurate sensing operation.…”

Section: Introductionmentioning

confidence: 99%

Design of Operational Transconductance Amplifiers for voltage to current conversion in gas sensing applications

Hijazi

Caviglia

Chiblé

et al. 2016

2016 AEIT International Annual Conference (AEIT)

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This paper presents a study of Operational Transconductance Amplifiers (OTAs) for voltage to current conversion circuits. The paper includes a comparative analysis of three OTA architectures implemented in 0.35µm CMOS AMS Technology under ± 1.65V power supply voltage. The impact of the OTA topology has been investigated by simulation. The designed OTAs managed to deliver large current values of 10mA and 1mA to the load with a worst-case error of 0.02% under worstcase power supply and temperature conditions and a worst percentage error of 0.12% under process variation for both Miller Compensated and Capacitor Multiplier Compensated OTA.

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