Analysis of 1/f2 and 1/f3 noise in the high-pass chopper amplifier with a high-impedance source

Myungjin Han, Gunhee Han

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

1 Citation (Scopus)

Abstract

Chopper stabilization is the most widely used circuit technique to reduce the influence of the flicker noise in an amplifier. Recently, observation of /f2 input-referred noise in the chopper amplifier with a high-impedance input source was reported. However, the mechanism of this /f2 phenomenon has not been completely analyzed. This paper provides the complete analysis of the noise influence generated by a chopper switch. The analysis suggests that the noise current of a chopper switch is directly fed to the output when the impedance of the input signal source is high. Then, the thermal noise of the chopper switch is reflected to the input showing /f2 characteristic while the flicker noise of the chopper switch is reflected to the input showing /f3 characteristic. This analysis has been verified with the simulation and measurement results.

Original languageEnglish
Title of host publicationIEEE 58th International Midwest Symposium on Circuits and Systems
Subtitle of host publicationClimbing to New Heights, MWSCAS 2015 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467365574
DOIs
Publication statusPublished - 2015 Sep 28
Event58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 - Fort Collins, United States
Duration: 2015 Aug 22015 Aug 5

Publication series

NameMidwest Symposium on Circuits and Systems
Volume2015-September
ISSN (Print)1548-3746

Other

Other58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015
CountryUnited States
CityFort Collins
Period15/8/215/8/5

All Science Journal Classification (ASJC) codes

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

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    Han, M., & Han, G. (2015). Analysis of 1/f2 and 1/f3 noise in the high-pass chopper amplifier with a high-impedance source. In IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings [7282126] (Midwest Symposium on Circuits and Systems; Vol. 2015-September). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSCAS.2015.7282126