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Erschienen in: Microsystem Technologies 3/2024

18.01.2024 | Technical Paper

A conceptual study on novel current mirror integrated cantilever (CMIC) mass sensor for micro-gram (\(\mu\)g) range sensing applications

verfasst von: Menuvolu Tetseo, Kalpana Gogoi, Shashi Kumar, Gaurav Kumar, Peesapati Rangababu, Akhilrendra Pratap Singh, Pradeep Kumar Rathore

Erschienen in: Microsystem Technologies | Ausgabe 3/2024

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Abstract

The work reported in this paper describes the design and simulation of a novel current mirror readout circuit based MOSFET integrated cantilever structure for micro-gram (\(\mu\)g) mass sensing applications. The proposed mass sensing structure consist of silicon cantilever as the micromechanical structure, MOSFET as strain sensing element and current mirror as a readout circuit. In this paper, studies have been carried out on three structures (a) n-channel MOSFET based resistive loaded current mirror integrated cantilever mass sensor (b) p-channel MOSFET based resistive loaded current mirror integrated cantilever mass sensor and (c) n- and p- channel MOSFETs based dual current mirror integrated cantilever mass sensor. The input MOSFET(s) of the current mirror acts as the reference transistor(s) while the output MOSFET(s) of the mirror circuit acts as strain sensing element(s) to measure the cantilever deflection under externally applied load. The structural and the electrical characteristics of the sensors were simulated using COMSOL Multiphysics and TSPICE software respectively. Simulation results showed a sensitivity of 21.89 \(\mu\)V/\(\mu\)g, 1 \(\mu\)V/\(\mu\)g and 115.57 \(\mu\)V/\(\mu\)g for nMOS, pMOS and dual channel cantilever mass sensor. The fabrication steps and mask layout of the proposed sensor have also been presented in this paper. The novelty of this work is emphasized by the innovative integration of a CMOS current mirror circuit with a cantilever for mass sensing.

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Metadaten
Titel
A conceptual study on novel current mirror integrated cantilever (CMIC) mass sensor for micro-gram (g) range sensing applications
verfasst von
Menuvolu Tetseo
Kalpana Gogoi
Shashi Kumar
Gaurav Kumar
Peesapati Rangababu
Akhilrendra Pratap Singh
Pradeep Kumar Rathore
Publikationsdatum
18.01.2024
Verlag
Springer Berlin Heidelberg
Erschienen in
Microsystem Technologies / Ausgabe 3/2024
Print ISSN: 0946-7076
Elektronische ISSN: 1432-1858
DOI
https://doi.org/10.1007/s00542-023-05594-8

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