IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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Amplitude modulation based readout for very dense active microelectrode arrays
Neil JoyeAlexandre SchmidYusuf Leblebici
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2011 Volume 8 Issue 1 Pages 38-44

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Abstract

A readout method which is suitable for high-density active microelectrode arrays used in electrophysiology experiments is presented. Amplitude modulation of consecutive channels enables simultaneous recording and transmission of the signals recorded on multiple electrodes, using a single amplifier. The physical limitation of the readout method is demonstrated to relate to the summation of the thermal noise of each recorded signal at the input of the amplification stage. Post-layout simulations of a possible circuit implementation in a 0.18µm CMOS technology show that five pixels connected to a single amplifier are feasible with a pitch dimension of 17µm, and an SNR value of 15dB.

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© 2011 by The Institute of Electronics, Information and Communication Engineers
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