A sub-1V CMOS Instrumentation Amplifier for an AFE Interfacing with Sensors

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

This paper presents the design of a low-noise capacitively-coupled instrumentation amplifier with a sub-1V power supply, which is suitable for low-power sensor data acquisition systems. This amplifier is part of an Analog Front-end (AFE) which is implemented in a standard 130nm bulk CMOS technology. Beside the high-impedance input amplifier, the AFE includes a programmable switch-capacitor bandpass filter and a sigma-delta modulator. A chopper modulation technique is implemented to further reduce the flicker noise, with a positive feedback network to compensate the resulting low input impedance. The preliminary post-layout simulated results of the instrumentation amplifier achieves a total power consumption of 2.6µW, with an open loop gain of 87dB and a GBW of 584kHz and with the input reffered noise of 4.6µVrms and a NEF value of 4. The maximum CMRR of the amplifier is 101dB and the PSRR minus is greater than 66dB. For a sub 1V power supply, the input frequency range is up to 10 kHz.

Original languageEnglish
Title of host publicationProceedings - 2021 International Young Engineers Forum in Electrical and Computer Engineering, YEF-ECE 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-6
Number of pages6
ISBN (Electronic)9781665412643
DOIs
Publication statusPublished - 2021
Event5th International Young Engineers Forum in Electrical and Computer Engineering, YEF-ECE 2021 - Caparica and Online, Portugal
Duration: 9 Jul 20219 Jul 2021

Conference

Conference5th International Young Engineers Forum in Electrical and Computer Engineering, YEF-ECE 2021
Country/TerritoryPortugal
CityCaparica and Online
Period9/07/219/07/21

Keywords

  • Analog front-end
  • CCIA
  • CMOS
  • MEMS

Fingerprint

Dive into the research topics of 'A sub-1V CMOS Instrumentation Amplifier for an AFE Interfacing with Sensors'. Together they form a unique fingerprint.

Cite this