Design of a Integrated readout Circuit for pH Sensor with Chopper Instrumentation Amplifier

DOI

10.2991/icadme-16.2016.159How to use a DOI?

Keywords

pH sensor; readout circuit; CMOS; chopper stabilization; instrumentation amplifier

Abstract

A readout circuit for capacitive pH sensor is designed and simulated by Spectre of Cadence software with TSMC 0.18 m CMOS process technology. It consists of a capacitance-voltage measuring circuit, a modulation and demodulation circuit, a instrumentation amplifier and a low-pass filter. The simulation results show that the sensitivity is 10.8mV/fF and the circuit reduces the low frequency noise and DC offset using the technique of chopper instrumentation amplifier.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yang Wang
AU  - Jiang Hu
AU  - Zongqi Guan
PY  - 2017/07
DA  - 2017/07
TI  - Design of a Integrated readout Circuit for pH Sensor with Chopper Instrumentation Amplifier
BT  - Proceedings of the 2016 6th International Conference on Advanced Design and Manufacturing Engineering (ICADME 2017)
PB  - Atlantis Press
SP  - 895
EP  - 899
SN  - 2352-5401
UR  - https://doi.org/10.2991/icadme-16.2016.159
DO  - 10.2991/icadme-16.2016.159
ID  - Wang2017/07
ER  -