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- W3089779509 abstract "Widening the range of targets for ion-sensitive field-effect transistors (ISFETs) fabricated in unmodified CMOS technology has been enabled by the deposition of polymeric ionophore membranes at the surface, requiring specific sensor training. We present a novel ISFET array with on-chip multiplexing capabilities to perform offline training and real-time sensing on a single substrate, enabling analogue averaging for low noise sensing and reducing post-processing. The analogue front-end pixels rely on a modular current-mode spatial averaging (CMSA) circuit, producing an averaged sensor output per cluster based on a switching matrix integrated within the array. At the output stage, a weak inversion active resistor implements an ELIN system to guarantee linearity, reaching an expected sensitivity of 160 mV/pH with a gain of 3, when designed using a 0.18 μm standard CMOS technology. Based on calibration data for the ion targets, an on-chip training algorithm determines the sensitivity of each pixel to each ion, identifies sensing regions corresponding to polymeric membranes at the surface and sets the pixel connectivity through the switching matrix." @default.
- W3089779509 created "2020-10-08" @default.
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- W3089779509 date "2020-10-01" @default.
- W3089779509 modified "2023-10-18" @default.
- W3089779509 title "An ISFET Array for Ion Multiplexing with an Integrated Sensor Learning Algorithm" @default.
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- W3089779509 doi "https://doi.org/10.1109/iscas45731.2020.9181027" @default.
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