A Low Noise CMOS Readout Based on a Polymer-Coated SAW Array for Miniature Electronic Nose
| Autor: | Szu-Chieh Liu, Cheng-Chun Wu, Shih-Wen Chiu, Kea-Tiong Tang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Engineering
02 engineering and technology Integrated circuit Hardware_PERFORMANCEANDRELIABILITY lcsh:Chemical technology 01 natural sciences Biochemistry Article Analytical Chemistry law.invention miniature electronic nose Application-specific integrated circuit Sensor array law 0202 electrical engineering electronic engineering information engineering Hardware_INTEGRATEDCIRCUITS lcsh:TP1-1185 Electrical and Electronic Engineering Center frequency Instrumentation Digital electronics low power business.industry 020208 electrical & electronic engineering 010401 analytical chemistry Surface acoustic wave Electrical engineering low noise surface acoustic wave sensor array Chip Atomic and Molecular Physics and Optics 0104 chemical sciences CMOS business |
| Zdroj: | Sensors, Vol 16, Iss 11, p 1777 (2016) Sensors; Volume 16; Issue 11; Pages: 1777 Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| Popis: | An electronic nose (E-Nose) is one of the applications for surface acoustic wave (SAW) sensors. In this paper, we present a low-noise complementary metal–oxide–semiconductor (CMOS) readout application-specific integrated circuit (ASIC) based on an SAW sensor array for achieving a miniature E-Nose. The center frequency of the SAW sensors was measured to be approximately 114 MHz. Because of interference between the sensors, we designed a low-noise CMOS frequency readout circuit to enable the SAW sensor to obtain frequency variation. The proposed circuit was fabricated in Taiwan Semiconductor Manufacturing Company (TSMC) 0.18 μm 1P6M CMOS process technology. The total chip size was nearly 1203 × 1203 μm2. The chip was operated at a supply voltage of 1 V for a digital circuit and 1.8 V for an analog circuit. The least measurable difference between frequencies was 4 Hz. The detection limit of the system, when estimated using methanol and ethanol, was 0.1 ppm. Their linearity was in the range of 0.1 to 26,000 ppm. The power consumption levels of the analog and digital circuits were 1.742 mW and 761 μW, respectively. |
| Databáze: | OpenAIRE |
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