An ultra low-power capacitively-coupled chopper instrumentation amplifier for wheatstone-bridge readout circuits

Moaaz Ahmed, Farid Boussaid, Amine Bermak

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This paper presents an ultra-low-power low-noise Capacitively-coupled Chopper Instrumentation Amplifier (CCIA). A current-reuse telescopic topology in the first stage along with a recycling folded-cascode topology in the second stage consumes net bias current of 26μ? with enhanced efficiency and achieves an input-referred noise power-spectral-density of 12.77nV/√Hz. The proposed CCIA is chopped at 50kHz to bring the input-referred offset around 6μV and flicker-noise corner around 400mHz. Implemented in chartered 0.18μm CMOS process and designed for Thermoresistive Micro Calorimetric Flow (TMCF) sensors, the reported work achieves an excellent Noise Efficiency Factor (NEF) of 2.5 which is the lowest ever reported NEF for such applications.

Original languageEnglish
Title of host publicationIEEE International Symposium on Circuits and Systems
Subtitle of host publicationFrom Dreams to Innovation, ISCAS 2017 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467368520
DOIs
Publication statusPublished - 25 Sep 2017
Event50th IEEE International Symposium on Circuits and Systems, ISCAS 2017 - Baltimore, United States
Duration: 28 May 201731 May 2017

Other

Other50th IEEE International Symposium on Circuits and Systems, ISCAS 2017
CountryUnited States
CityBaltimore
Period28/5/1731/5/17

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Ahmed, M., Boussaid, F., & Bermak, A. (2017). An ultra low-power capacitively-coupled chopper instrumentation amplifier for wheatstone-bridge readout circuits. In IEEE International Symposium on Circuits and Systems: From Dreams to Innovation, ISCAS 2017 - Conference Proceedings [8050330] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISCAS.2017.8050330