A 2.1 μW/channel current-mode integrated neural recording interface
A. Zjajo (TU Delft - Electrical Engineering, Mathematics and Computer Science)
R. van Leuken (TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
In this paper, we present a neural recording interface circuit for biomedical implantable devices, which includes low-noise signal amplification, band-pass filtering, and current-mode successive approximation A/D signal conversion. The integrated interface circuit is realized in a 65 nm CMOS technology, and consumes less than 2.1 μW/channel of which A/D converter consumes 367 nW, corresponding to a figure of merit of 14 fJ/conv.-step, while operating from a 1 V supply.