Design of a low voltage 0.18 um CMOS Surface Acoustic Wave gas sensor

Moghavvemi, M. and Attaran, A. (2011) Design of a low voltage 0.18 um CMOS Surface Acoustic Wave gas sensor. Sensors and Transducers, 125 (2). pp. 22-29. ISSN 17265479,

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A Surface Acoustic Wave (SAW) gas sensor is designed and tested in this paper. The objective of the designed SAW Gas sensor is to detect H2S and NOX gases. The inter-digital transducers (IDT) antennas in the proposed sensor are coated with thin film WO3, which mass is sensitive to mentioned gas concentrations upon close contact. The changes in WO3 mass are registered as frequency shift from 300 to 500 MHz. The sensor blocks are simulated, fabricated and tested for an operating frequency of 300 MHz to 350 MHz. A relatively linear response is achieved with a step of 0.1 V for 10 MHz step frequency shift emitted from WO3 coated IDTs. This fully integrated signal processing circuitry designed by 0.18 um CMOS process is simple, cost effective, small in size, has low power consumption, and fast real-time operation response as well.

Item Type: Article
Uncontrolled Keywords: 0.18 um CMOS; H2S; NOX; SAW gas sensor; Signal processing; 0.18 um CMOS; CMOS processs; Cost effective; Frequency shift; Fully integrated; Gas concentration; HS; Interdigital transducer; Linear response; Low voltages; Low-power consumption; NO; Operating frequency; Real-time operation; SAW gas sensor; SAW gas sensors; Step frequency; Surface acoustic wave gas sensors; Sensors
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Ms. Norhamizah Tamizi
Date Deposited: 25 Mar 2014 08:01
Last Modified: 23 Nov 2017 03:20

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