@inproceedings{d689f00c8d7b4a2ea29eeb29064c77a8,
title = "Linear Pulse-Frequency Modulator ISFET with a Wide Supply Range",
abstract = "We present an analogue front-end for an ISFET sensor with a programmable linear pulse frequency output. The CMOS chip was designed in 0.18 µm technology and electrically characterized. A Veriloga model was used to simulate the ISFET interface with a sensitivity of 30 mV/pH for a Si 3 N 4 membrane. The architecture provides a pulse signal with a 50% duty cycle which encodes a frequency related to the pH of a solution. The linear sensitivity for a ΔV of 600mV in the control circuit is 17.3 kHz/pH, with a minimum and maximum sensitivity of 11.6 - 50.66 kHz/pH, respectively, depending on the setup conditions. The simulation results show a robust and power efficient architecture with a power consumption of 144.2 µW, and a stable response against a ~25% decrease in the power supply.",
author = "Jose Cortes-guzman and Andreas Tsiamis and Cumming, {David R. S.} and Srinjoy Mitra",
note = "Proxy DOA to exclude from REF. Original DOA 17/08/21; 2021 IEEE Sensors ; Conference date: 31-10-2021 Through 03-11-2021",
year = "2021",
month = dec,
day = "17",
doi = "10.1109/SENSORS47087.2021.9639752",
language = "English",
series = "IEEE Sensors",
publisher = "Institute of Electrical and Electronics Engineers",
pages = "1--4",
booktitle = "2021 IEEE Sensors",
address = "United States",
}