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

Myungjin Han; Gunhee Han

doi:10.1109/MWSCAS.2015.7282126

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

Myungjin Han, Gunhee Han

School of Integrated Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
Title of host publication	IEEE 58th International Midwest Symposium on Circuits and Systems
Subtitle of host publication	Climbing to New Heights, MWSCAS 2015 - Conference Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781467365574
DOIs	https://doi.org/10.1109/MWSCAS.2015.7282126
Publication status	Published - 2015 Sept 28
Event	58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 - Fort Collins, United States Duration: 2015 Aug 2 → 2015 Aug 5

Publication series

Name	Midwest Symposium on Circuits and Systems
Volume	2015-September
ISSN (Print)	1548-3746

Other

Other	58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015
Country/Territory	United States
City	Fort Collins
Period	15/8/2 → 15/8/5

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/MWSCAS.2015.7282126

Cite this

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 Article 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

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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.",

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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., 58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015, Fort Collins, United States, 15/8/2. https://doi.org/10.1109/MWSCAS.2015.7282126

Analysis of 1/f² and 1/f³ noise in the high-pass chopper amplifier with a high-impedance source. / Han, Myungjin; Han, Gunhee.
IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., 2015. 7282126 (Midwest Symposium on Circuits and Systems; Vol. 2015-September).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - 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.

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Han M, Han G. 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. Institute of Electrical and Electronics Engineers Inc. 2015. 7282126. (Midwest Symposium on Circuits and Systems). doi: 10.1109/MWSCAS.2015.7282126