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A new CMOS current attenuator circuit is designed and demonstrated. The purpose of this circuit is to attenuate steady state current in conjunction with CMOS ADC readout circuits for electrochemical sensing applications. The circuit has been fabricated in a 5 V AMS CMOS process. Salient features include: (1) bi-directional input current range from 25 nA to 300 nA; (2) current attenuation of 55 dB;...
Molten salt is a corrosive, high temperature environment which is extremely challenging for sensing technologies. Microelectrodes are well-positioned as high fidelity electrochemical sensors and previous work has delivered microelectrodes capable of operating in such conditions. However, the lifetime of these sensors requires improvement. This work investigates the origins of device failure.
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