A nested-chopped current-feedback instrumentation amplifier for MEMS flow sensors

Moaaz Ahmed, Saqib Mohamad, Amine Bermak

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

2 Citations (Scopus)

Abstract

A nested chopped current-feedback instrumentation amplifier (CFIA) designed for micro-fluidic applications is reported in this work. The proposed CFIA is chopped at 50kHz to bring input-referred offset below 12 μV and flicker-noise corner around 100mHz. In order to further suppress the residue offset to nV-level, the CFIA is again chopped with a slower clock of 500Hz to achieve an input-referred offset of 149nV. The CMOS readout interface for MEMS flow sensor achieves a thermal-noise power spectral density of 4.34nV √ Hz for realizing over 12- bits dynamic range. Implemented in chartered 0.18 μm CMOS process, the CFIA draws 522 μ A supply current and achieves an excellent noise efficiency factor (NEF) of 3.82 which is the lowest ever reported with CFIAs.

Original languageEnglish
Title of host publication2016 IEEE 59th International Midwest Symposium on Circuits and Systems, MWSCAS 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509009169
DOIs
Publication statusPublished - 2 Mar 2017
Event59th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2016 - Abu Dhabi, United Arab Emirates
Duration: 16 Oct 201619 Oct 2016

Other

Other59th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2016
CountryUnited Arab Emirates
CityAbu Dhabi
Period16/10/1619/10/16

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Ahmed, M., Mohamad, S., & Bermak, A. (2017). A nested-chopped current-feedback instrumentation amplifier for MEMS flow sensors. In 2016 IEEE 59th International Midwest Symposium on Circuits and Systems, MWSCAS 2016 [7869997] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSCAS.2016.7869997