Microelectrode Array on CMOS with Integrated VLSI Potentiostat

TITLE: Microelectrode Array on CMOS with Integrated VLSI Potentiostat

Advisor: Sameer R Sonkusale, David Walt

Researchers: Meera Punjiya, Pooria Mostafalu, Sungkil Hwang (Completed),  Vinay Agarwal (Completed)

ABSTRACT:

We have succesfully fabricated of gold microelectrode arrays directly on CMOS for electrochemical sensing applications. Built-in row and column decoder provides individual access to microelectrodes, and built-in VLSI circuits provide  high resolution, high sensitivity readout. Such microelectrode arrays are ideal for lab-on-chip applications. Our next step in this project is to increase the sensitivity of the readout electronics and to expand applications to biological sensing.

RESULTS:

In the area of application specific sensing front ends, for the first time (IEEE Sensors Journal 2009). In another work, we implemented a high gain transimpedance amplifier for potentiostat applications with much lower input impedance using a modified wilson current mirror topology with feedback (IEEE Sensors Journal 2010).

PUBLICATIONS

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