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A Frequency-Shift based CMOS Magnetic Biosensor with Spatially Uniform Sensor Transducer Gain

Wang, Hua and Sideris, Constantine and Hajimiri, Ali (2010) A Frequency-Shift based CMOS Magnetic Biosensor with Spatially Uniform Sensor Transducer Gain. In: 2010 IEEE Custom Integrated Circuits Conference. IEEE Custom Integrated Circuits Conference . IEEE , New York, NY, pp. 1-4. ISBN 978-1-4244-5760-1. http://resolver.caltech.edu/CaltechAUTHORS:20110310-094654711

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Abstract

This paper presents a scalable and ultrasensitive magnetic biosensing scheme based on on-chip LC resonance frequency-shifting. The sensor transducer gain is demonstrated as being location-dependent on the sensing surface and proportional to the local polarization magnetic field strength |B|^2 generated by the sensing inductor. To improve the gain uniformity, a bowl-shape stacked coil together with floating shimming metal is proposed for the inductor design. As an implementation example, a 16-cell sensor array is designed in a 45nm CMOS process. The spatially uniform sensor gain of the array is verified by testing micron-size magnetic particles randomly placed on the sensing surface. The Correlated-Double-Counting (CDC) noise cancellation scheme is also implemented in the presented design, which achieves a noise suppression of 10.6dB with no power overhead. Overall, the presented sensor demonstrates a dynamic range of at least 85.4dB.


Item Type:Book Section
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http://dx.doi.org/10.1109/CICC.2010.5617603 DOIUNSPECIFIED
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5617603&tag=1PublisherUNSPECIFIED
Additional Information:© 2010 IEEE. Issue Date: 19-22 September 2010, Date of Current Version: 01 November 2010.
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INSPEC Accession Number11627759
Record Number:CaltechAUTHORS:20110310-094654711
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110310-094654711
Official Citation:Hua Wang; Sideris, C.; Hajimiri, A.; , "A frequency-shift based CMOS magnetic biosensor with spatially uniform sensor transducer gain," Custom Integrated Circuits Conference (CICC), 2010 IEEE , vol., no., pp.1-4, 19-22 Sept. 2010 doi: 10.1109/CICC.2010.5617603 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5617603&isnumber=5617377
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22794
Collection:CaltechAUTHORS
Deposited By: Benjamin Perez
Deposited On:10 Mar 2011 17:59
Last Modified:22 Aug 2016 23:59

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