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Analysis of On-Chip Impedance Spectroscopy Methodologies for Sensor Arrays

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Despite the great number of exciting applications for chip-scale, impedance-based sensor arrays, almost no on-chip instrumentation circuitry exists to support such systems. This void is inhibiting further research with many nanotechnology sensors and impeding the full potential of many related applications. This paper outlines the key requirements for instrumentation circuitry to measure the complex impedance of sensor arrays. It analyzes the three most likely approaches for filling this void: FFT, FRA, and a recently introduced rapid FRA system. The requirements and tradeoffs in the on-chip realization of each approach are presented, and the rapid FRA method is shown to provide the best combination of speed and hardware simplicity.


Document Type: Research Article

DOI: http://dx.doi.org/10.1166/sl.2006.054

Publication date: December 1, 2006

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  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
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