A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching

Yongsu Kwon; Hyungseup Kim; Donggeun You; Hyunwoo Heo; Hyoungho Ko; Sangmin Lee

doi:10.1109/ICEIC51217.2021.9369740

A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching

Yongsu Kwon
, Hyungseup Kim
, Donggeun You
, Hyunwoo Heo
, Hyoungho Ko
, Sangmin Lee

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

4 Citations (Scopus)

Abstract

This paper proposes a bipolar junction transistor (BJT) based complementary metal-oxide-semiconductor (CMOS) body temperature sensor analog front-end (AFE) with dynamic element matching (DEM). To reduce mismatches of current sources and transistors resulting from process spread, DEM is implemented. A chopper stabilization technique is implemented to minimize input offset at op-amp which forms a feedback loop to generate proportional-to-absolute-temperature (PTAT) currents in the temperature sensor core. The gain stage used to achieve high-resolution output of temperature sensor implements non-inverting amplifier using R-2R digital-to-analog converter (DAC) to perform amplification regardless of the output offset voltage of the temperature sensor core. The proposed temperature sensor is implemented in a $0.18\ \mu\mathrm{m}$ CMOS process, occupies 0.1 mm2, and consumes $4.85\ \mu\mathrm{A}$ from 3.3 V I/O and 1.8 V core voltage.

Original language	English
Title of host publication	2021 International Conference on Electronics, Information, and Communication, ICEIC 2021
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728191614
DOIs	https://doi.org/10.1109/ICEIC51217.2021.9369740
Publication status	Published - 31 Jan 2021
Event	2021 International Conference on Electronics, Information, and Communication, ICEIC 2021 - Jeju, Korea, Republic of Duration: 31 Jan 2021 → 3 Feb 2021

Publication series

Name	2021 International Conference on Electronics, Information, and Communication, ICEIC 2021

Conference

Conference	2021 International Conference on Electronics, Information, and Communication, ICEIC 2021
Country/Territory	Korea, Republic of
City	Jeju
Period	31/01/21 → 3/02/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

Keywords

Body temperature sensor analog front-end (AFE)
Chopper stabilization technique
Dynamic element matching (DEM)
R-2R digital-to-analog converter (DAC)

Access to Document

10.1109/ICEIC51217.2021.9369740

Cite this

Kwon, Y., Kim, H., You, D., Heo, H., Ko, H., & Lee, S. (2021). A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching. In 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021 Article 9369740 (2021 International Conference on Electronics, Information, and Communication, ICEIC 2021). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICEIC51217.2021.9369740

Kwon, Yongsu ; Kim, Hyungseup ; You, Donggeun et al. / A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching. 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021. Institute of Electrical and Electronics Engineers Inc., 2021. (2021 International Conference on Electronics, Information, and Communication, ICEIC 2021).

@inproceedings{d7f5c1089959467ab534b1a57d97167d,

title = "A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching",

abstract = "This paper proposes a bipolar junction transistor (BJT) based complementary metal-oxide-semiconductor (CMOS) body temperature sensor analog front-end (AFE) with dynamic element matching (DEM). To reduce mismatches of current sources and transistors resulting from process spread, DEM is implemented. A chopper stabilization technique is implemented to minimize input offset at op-amp which forms a feedback loop to generate proportional-to-absolute-temperature (PTAT) currents in the temperature sensor core. The gain stage used to achieve high-resolution output of temperature sensor implements non-inverting amplifier using R-2R digital-to-analog converter (DAC) to perform amplification regardless of the output offset voltage of the temperature sensor core. The proposed temperature sensor is implemented in a \$0.18\textbackslash{} \textbackslash{}mu\textbackslash{}mathrm\{m\}\$ CMOS process, occupies 0.1 mm2, and consumes \$4.85\textbackslash{} \textbackslash{}mu\textbackslash{}mathrm\{A\}\$ from 3.3 V I/O and 1.8 V core voltage.",

keywords = "Body temperature sensor analog front-end (AFE), Chopper stabilization technique, Dynamic element matching (DEM), R-2R digital-to-analog converter (DAC)",

author = "Yongsu Kwon and Hyungseup Kim and Donggeun You and Hyunwoo Heo and Hyoungho Ko and Sangmin Lee",

note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021 ; Conference date: 31-01-2021 Through 03-02-2021",

year = "2021",

month = jan,

day = "31",

doi = "10.1109/ICEIC51217.2021.9369740",

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Kwon, Y, Kim, H, You, D, Heo, H, Ko, H & Lee, S 2021, A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching. in 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021., 9369740, 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021, Institute of Electrical and Electronics Engineers Inc., 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021, Jeju, Korea, Republic of, 31/01/21. https://doi.org/10.1109/ICEIC51217.2021.9369740

A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching. / Kwon, Yongsu; Kim, Hyungseup; You, Donggeun et al.
2021 International Conference on Electronics, Information, and Communication, ICEIC 2021. Institute of Electrical and Electronics Engineers Inc., 2021. 9369740 (2021 International Conference on Electronics, Information, and Communication, ICEIC 2021).

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

TY - GEN

T1 - A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching

AU - Kwon, Yongsu

AU - Kim, Hyungseup

AU - You, Donggeun

AU - Heo, Hyunwoo

AU - Ko, Hyoungho

AU - Lee, Sangmin

PY - 2021/1/31

Y1 - 2021/1/31

N2 - This paper proposes a bipolar junction transistor (BJT) based complementary metal-oxide-semiconductor (CMOS) body temperature sensor analog front-end (AFE) with dynamic element matching (DEM). To reduce mismatches of current sources and transistors resulting from process spread, DEM is implemented. A chopper stabilization technique is implemented to minimize input offset at op-amp which forms a feedback loop to generate proportional-to-absolute-temperature (PTAT) currents in the temperature sensor core. The gain stage used to achieve high-resolution output of temperature sensor implements non-inverting amplifier using R-2R digital-to-analog converter (DAC) to perform amplification regardless of the output offset voltage of the temperature sensor core. The proposed temperature sensor is implemented in a $0.18\ \mu\mathrm{m}$ CMOS process, occupies 0.1 mm2, and consumes $4.85\ \mu\mathrm{A}$ from 3.3 V I/O and 1.8 V core voltage.

AB - This paper proposes a bipolar junction transistor (BJT) based complementary metal-oxide-semiconductor (CMOS) body temperature sensor analog front-end (AFE) with dynamic element matching (DEM). To reduce mismatches of current sources and transistors resulting from process spread, DEM is implemented. A chopper stabilization technique is implemented to minimize input offset at op-amp which forms a feedback loop to generate proportional-to-absolute-temperature (PTAT) currents in the temperature sensor core. The gain stage used to achieve high-resolution output of temperature sensor implements non-inverting amplifier using R-2R digital-to-analog converter (DAC) to perform amplification regardless of the output offset voltage of the temperature sensor core. The proposed temperature sensor is implemented in a $0.18\ \mu\mathrm{m}$ CMOS process, occupies 0.1 mm2, and consumes $4.85\ \mu\mathrm{A}$ from 3.3 V I/O and 1.8 V core voltage.

KW - Body temperature sensor analog front-end (AFE)

KW - Chopper stabilization technique

KW - Dynamic element matching (DEM)

KW - R-2R digital-to-analog converter (DAC)

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DO - 10.1109/ICEIC51217.2021.9369740

M3 - Conference contribution

AN - SCOPUS:85102969856

T3 - 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021

BT - 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021

Y2 - 31 January 2021 through 3 February 2021

ER -

Kwon Y, Kim H, You D, Heo H, Ko H, Lee S. A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching. In 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021. Institute of Electrical and Electronics Engineers Inc. 2021. 9369740. (2021 International Conference on Electronics, Information, and Communication, ICEIC 2021). doi: 10.1109/ICEIC51217.2021.9369740

A BJT-Based CMOS Body Temperature Sensor Analog Front-End with Dynamic Element Matching

Abstract

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Keywords

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