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- W2994390622 abstract "Ion sensitive field effect transistors (ISFETs) are CMOS-compatible pH sensors which have been adopted for a wide range of biochemical sensing applications. Drift and low-frequency noise are perennial challenges for these small charge-sensitive devices. However, ISFET designers have often avoided the common circuit solution of chopper stabilization due to understandable concern that the switching will disturb the sensing gate. Here we introduce a new configuration which modulates the source and drain voltages of the ISFET, reducing 1/f noise and drift with negligible disturbance of the sensing gate. We experimentally demonstrate this in-pixel chopping scheme with titanium nitride ISFETs in 180-nm CMOS technology. Using in-pixel chopping, the circuit achieves a three-fold reduction in drift along with suppression of 1/f noise." @default.
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- W2994390622 date "2019-10-01" @default.
- W2994390622 modified "2023-09-23" @default.
- W2994390622 title "Low Noise CMOS ISFETs Using In-Pixel Chopping" @default.
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- W2994390622 doi "https://doi.org/10.1109/biocas.2019.8919025" @default.
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