The effect of source resistance on the linearity of Nauta structure OTA

Long Pham; Astria Nur Irfansyah; Tara Julia Hamilton; Torsten Lehmann

doi:10.1109/MWSCAS.2017.8053146

The effect of source resistance on the linearity of Nauta structure OTA

Long Pham, Astria Nur Irfansyah, Tara Julia Hamilton, Torsten Lehmann

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

1 Citation (Scopus)

Abstract

In conventional design of Nauta transconductor, the limitation of output voltage swing is usually the price for very high DC-gain due to inevitable non-linear effects in the transconductor. Nevertheless, a new design of Nauta transconductor in sub-micron CMOS technology with digitally-controlled transconductance may bring along opportunities to adjust the intrinsic gain of Nauta transconductor which, in turn, provides us freedom to concentrate on the linearity enhancement of the transconductor itself. This can be done thanks to the effect of source resistance to the distortion in CMOS transistor circuits. In this paper, we propose a method to calibrate the resistance in the source terminal of self-coupled inverters so that it improves the linearity as well as the output voltage swing of a Nauta structure op-amp designed in 65nm process without the sacrifice of its intrinsic gain.

Original language	English
Title of host publication	2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1208-1211
Number of pages	4
ISBN (Electronic)	9781509063895
DOIs	https://doi.org/10.1109/MWSCAS.2017.8053146
Publication status	Published - 27 Sept 2017
Event	60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017 - Boston, United States Duration: 6 Aug 2017 → 9 Aug 2017

Publication series

Name	Midwest Symposium on Circuits and Systems
Volume	2017-August
ISSN (Print)	1548-3746

Conference

Conference	60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017
Country/Territory	United States
City	Boston
Period	6/08/17 → 9/08/17

Keywords

CMOS inverters
Complementary CS stage
Linearization
Nauta transconductor
Source resistance

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10.1109/MWSCAS.2017.8053146

Cite this

Pham, L., Irfansyah, A. N., Hamilton, T. J., & Lehmann, T. (2017). The effect of source resistance on the linearity of Nauta structure OTA. In 2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017 (pp. 1208-1211). Article 8053146 (Midwest Symposium on Circuits and Systems; Vol. 2017-August). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSCAS.2017.8053146

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title = "The effect of source resistance on the linearity of Nauta structure OTA",

abstract = "In conventional design of Nauta transconductor, the limitation of output voltage swing is usually the price for very high DC-gain due to inevitable non-linear effects in the transconductor. Nevertheless, a new design of Nauta transconductor in sub-micron CMOS technology with digitally-controlled transconductance may bring along opportunities to adjust the intrinsic gain of Nauta transconductor which, in turn, provides us freedom to concentrate on the linearity enhancement of the transconductor itself. This can be done thanks to the effect of source resistance to the distortion in CMOS transistor circuits. In this paper, we propose a method to calibrate the resistance in the source terminal of self-coupled inverters so that it improves the linearity as well as the output voltage swing of a Nauta structure op-amp designed in 65nm process without the sacrifice of its intrinsic gain.",

keywords = "CMOS inverters, Complementary CS stage, Linearization, Nauta transconductor, Source resistance",

author = "Long Pham and Irfansyah, {Astria Nur} and Hamilton, {Tara Julia} and Torsten Lehmann",

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Pham, L, Irfansyah, AN, Hamilton, TJ & Lehmann, T 2017, The effect of source resistance on the linearity of Nauta structure OTA. in 2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017., 8053146, Midwest Symposium on Circuits and Systems, vol. 2017-August, Institute of Electrical and Electronics Engineers Inc., pp. 1208-1211, 60th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2017, Boston, United States, 6/08/17. https://doi.org/10.1109/MWSCAS.2017.8053146

The effect of source resistance on the linearity of Nauta structure OTA. / Pham, Long; Irfansyah, Astria Nur; Hamilton, Tara Julia et al.
2017 IEEE 60th International Midwest Symposium on Circuits and Systems, MWSCAS 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 1208-1211 8053146 (Midwest Symposium on Circuits and Systems; Vol. 2017-August).

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

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AU - Pham, Long

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AU - Hamilton, Tara Julia

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PY - 2017/9/27

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N2 - In conventional design of Nauta transconductor, the limitation of output voltage swing is usually the price for very high DC-gain due to inevitable non-linear effects in the transconductor. Nevertheless, a new design of Nauta transconductor in sub-micron CMOS technology with digitally-controlled transconductance may bring along opportunities to adjust the intrinsic gain of Nauta transconductor which, in turn, provides us freedom to concentrate on the linearity enhancement of the transconductor itself. This can be done thanks to the effect of source resistance to the distortion in CMOS transistor circuits. In this paper, we propose a method to calibrate the resistance in the source terminal of self-coupled inverters so that it improves the linearity as well as the output voltage swing of a Nauta structure op-amp designed in 65nm process without the sacrifice of its intrinsic gain.

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The effect of source resistance on the linearity of Nauta structure OTA

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