NDLI: Performance optimization of temperature compensated surface acoustic wave biosensors

Content Provider	IEEE Xplore Digital Library
Author	Shuangming Li Yan Su Ying Wan Zheng Tang
Copyright Year	2013
Description	Author affiliation: MEMS Sensor Technol. Res. Center, Nanjing Univ. of Sci. & Technol., Nanjing, China (Shuangming Li; Yan Su; Ying Wan; Zheng Tang)
Abstract	Temperature has great influences on the surface acoustic wave (SAW) biosensors. Different substrates were tested and the methods for improving the temperature performance of the SAW biosensors were discussed here. The effects of temperature on the SAW sensors mainly result from the temperature coefficient of the SAW device and the oscillating circuit. To eliminate the impact of environment, a twin delay lines SAW biosensor operating at 198 MHz, with a sensor channel and a reference channel, was fabricated on 36°Y-X $LiTaO_{3}$ piezoelectric crystals. The signals of the two channels were multiplied by a mixer to compensate the influences of temperature. Since the temperature may affect the quiescent point of amplifier, the open loop phase would change, resulting in a frequency shift of the SAW oscillator. Therefore, a simple and effective circuit structure with a comparator limiting the oscillation amplitude was applied to the design of the SAW oscillator. At last, the temperature performance of our design was tested. Our design was demonstrated having a great performance with a temperature coefficient about 2 ppm/°C.
Starting Page	62
Ending Page	66
File Size	853651
Page Count	5
File Format	PDF
ISSN	21568073
e-ISBN	9781467352222
DOI	10.1109/ICSensT.2013.6727617
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-12-03
Publisher Place	New Zealand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature sensors biosensor Surface acoustic waves Surface acoustic wave devices oscillating circuit temperature performance Biosensors surface acoustic wave Lithium compounds Substrates Oscillators
Content Type	Text
Resource Type	Article

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