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We have developed a novel platform comprising a 3-D micropillar sensor array that can be encapsulated with high-$k$ dielectric material for applications in capacitive neural sensing. The present device incorporates over 3800 micropillar electrodes, grouped into 60 independent sensor clusters (for compatibility with existing electronics), spread over an area of 750 $\mu \text{m}^{2}$ . Each sensor...
In this paper, we describe an active pixel CMOS image sensor that employs a current-sensing readout circuit. The readout uses a column-level current-sensing amplifier with negative feedback to increase current driving capability, which gives significantly faster settling time. A prototype $128\,\times \,3$ pixel sensor with a current gain of 10 was fabricated using standard 0.35-$\mu \text{m}$ ...
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