Low‐power temperature‐independent CMOS measurement circuits for resistive gas sensors

Goyret, Juan Pablo; Cassani, M.V.; Carbonetto, S.; Garcia-Inza, M.

doi:10.1002/cta.3562

Circuit Theory & Apps

2023

DOI: 10.1002/cta.3562

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Low‐power temperature‐independent CMOS measurement circuits for resistive gas sensors

Juan Pablo Goyret

M.V. Cassani

S. Carbonetto

et al.

Abstract: In this work, we present the design of three different circuits for the measurement of resistive gas sensors. Schematic designs of each approach are discussed and simulated using HSPICE in a commercial CMOS 180 nm technology node.

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Cited by 2 publications

References 15 publications

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Low noise, temperature‐compensated, electrochemical cell sigma–delta current measurement readout circuit

Tahani,

Habibi,

Magierowski

2024

Circuit Theory & Apps

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SummaryNanopore ion channels are a promising solution for certain molecular structure analyses. Large arrays of nanopore channels and their associated readout circuits are used in many molecular studies such as DNA sequencing. Readout circuits must meet challenging performance criteria such as low noise operation, low power consumption, in‐channel digitization capability, and high linearity. Previously, sigma–delta modulators have been presented to address these criteria; however, their specifications show drifts with temperature. In this paper, an approach is presented to keep modulator performance constant with temperature variations. For this purpose, the sigma–delta modulator's feedforward and feedback branches are modified so that their gain coefficient remains constant over a certain temperature range. With large sensors arrays, solutions employing high bias currents in the feedback paths are not suitable due to power consumption limitations. Here, the design gives the possibility of switching low current levels in the feedback paths without affecting the ENOB. The proposed temperature compensation solution shows good performance when temperature is swept from 27°C to 100°C. Over the mentioned temperature range, the gain and bandwidth of the modulator show a change of less than 0.4%. It is further shown that for a 10 kHz input current signal with an amplitude of 600 pA, the ENOB and power consumption are 12.9 and 4.6 mW, respectively.

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Low noise, temperature‐compensated, electrochemical cell sigma–delta current measurement readout circuit

Tahani,

Habibi,

Magierowski

2024

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

High performance low power CMOS temperature sensor

Peng

2023

JCM

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A temperature sensor based on the combination of a temperature variable oscillator and a linear controlled oscillator is proposed, which can realize temperature detection through the characteristic of frequency changing with temperature. The changing frequency is generated by the two oscillators, and by adjusting the frequency linear change, the linearity of the sensor is also increased. Through the frequency digitizer, the digital signal can be output. Compensation through a process compensator improves the accuracy of the sensor after a single point correction. After conducting tests on 15 experimental samples, the accuracy was achieved within ± 1.2∘C across the temperature range of 0 to 125∘C, demonstrating a highly favorable level of precision.

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Low‐power temperature‐independent CMOS measurement circuits for resistive gas sensors

Abstract: In this work, we present the design of three different circuits for the measurement of resistive gas sensors. Schematic designs of each approach are discussed and simulated using HSPICE in a commercial CMOS 180 nm technology node.

Cited by 2 publications

References 15 publications

Low noise, temperature‐compensated, electrochemical cell sigma–delta current measurement readout circuit

Low noise, temperature‐compensated, electrochemical cell sigma–delta current measurement readout circuit

High performance low power CMOS temperature sensor

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