Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics

Nishtha Wadhwa; Pydi Bahubalindruni; Ana Correia; João Goes; Sujay Deb; Pedro Barquinha

doi:10.1109/ISCAS51556.2021.09401704

Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics

Nishtha Wadhwa, Pydi Bahubalindruni, Ana Correia, João Goes, Sujay Deb, Pedro Barquinha

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

9 Citations (Scopus)

Abstract

This paper presents a novel mostly passive ∆-Σ ADC using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs). The ADC circuit consists of passive elements (resistors and capacitors), a novel dynamic comparator, a D-Flip Flop and a pseudo-CMOS BS inverter. In-house oxide TFT model is used for circuit simulations in Cadence environment. The proposed ADC results in effective-number-of-bits (ENOB) of 11.2 bits and a figure-of-merit (FOM) of 0.15 µJ/conversion step at 2 kHz sampling frequency with a 10 V power supply. This circuit would find potential applications in biomedical wearable systems, in which, the ADC is probably the most important block.

Original language	English
Title of host publication	2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings
Place of Publication	New York, USA
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	1-6
Number of pages	6
ISBN (Print)	978-1-7281-9201-7
DOIs	https://doi.org/10.1109/ISCAS51556.2021.09401704
Publication status	Published - 2021
Event	53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Daegu, Korea, Republic of Duration: 22 May 2021 → 28 May 2021

Publication series

Name	Proceedings - IEEE International Symposium on Circuits and Systems
Volume	2021-May
ISSN (Print)	0271-4310

Conference

Conference	53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021
Country/Territory	Korea, Republic of
City	Daegu
Period	22/05/21 → 28/05/21

Keywords

Delta-Sigma ADC
a-IGZO TFTs
Dynamic Comparator
D-Flip Flop
Pseudo-CMOS BS Inverter

Access to Document

10.1109/ISCAS51556.2021.09401704

Cite this

Wadhwa, N., Bahubalindruni, P., Correia, A., Goes, J., Deb, S., & Barquinha, P. (2021). Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics. In 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings (pp. 1-6). Article 9401704 (Proceedings - IEEE International Symposium on Circuits and Systems; Vol. 2021-May). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ISCAS51556.2021.09401704

Wadhwa, Nishtha ; Bahubalindruni, Pydi ; Correia, Ana et al. / Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics. 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings. New York, USA : Institute of Electrical and Electronics Engineers (IEEE), 2021. pp. 1-6 (Proceedings - IEEE International Symposium on Circuits and Systems).

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abstract = "This paper presents a novel mostly passive ∆-Σ ADC using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs). The ADC circuit consists of passive elements (resistors and capacitors), a novel dynamic comparator, a D-Flip Flop and a pseudo-CMOS BS inverter. In-house oxide TFT model is used for circuit simulations in Cadence environment. The proposed ADC results in effective-number-of-bits (ENOB) of 11.2 bits and a figure-of-merit (FOM) of 0.15 µJ/conversion step at 2 kHz sampling frequency with a 10 V power supply. This circuit would find potential applications in biomedical wearable systems, in which, the ADC is probably the most important block.",

keywords = "Delta-Sigma ADC, a-IGZO TFTs, Dynamic Comparator, D-Flip Flop, Pseudo-CMOS BS Inverter",

author = "Nishtha Wadhwa and Pydi Bahubalindruni and Ana Correia and Jo{\~a}o Goes and Sujay Deb and Pedro Barquinha",

note = "info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FCTM%2F50025%2F2013/PT# info:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F122286%2F2016/PT# This work is also supported by early career research grant with project ref. ECR/2017/000931 and IISER Bhopal. This work is funded by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT - Portuguese Foundation for Science and Technology under the projects number POCI-01-0145-FEDER-007688, 5 This work also received funding from the European Community H2020 program under grant agreement No. 716510 (ERC-2016-STG TREND), and No. 692373 (BET-EU).; 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021 ; Conference date: 22-05-2021 Through 28-05-2021",

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Wadhwa, N, Bahubalindruni, P , Correia, A , Goes, J, Deb, S & Barquinha, P 2021, Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics. in 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings., 9401704, Proceedings - IEEE International Symposium on Circuits and Systems, vol. 2021-May, Institute of Electrical and Electronics Engineers (IEEE), New York, USA, pp. 1-6, 53rd IEEE International Symposium on Circuits and Systems, ISCAS 2021, Daegu, Korea, Republic of, 22/05/21. https://doi.org/10.1109/ISCAS51556.2021.09401704

Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics. / Wadhwa, Nishtha; Bahubalindruni, Pydi ; Correia, Ana et al.
2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings. New York, USA: Institute of Electrical and Electronics Engineers (IEEE), 2021. p. 1-6 9401704 (Proceedings - IEEE International Symposium on Circuits and Systems; Vol. 2021-May).

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

TY - GEN

T1 - Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics

AU - Wadhwa, Nishtha

AU - Bahubalindruni, Pydi

AU - Correia, Ana

AU - Goes, João

AU - Deb, Sujay

AU - Barquinha, Pedro

N1 - info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FCTM%2F50025%2F2013/PT# info:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F122286%2F2016/PT# This work is also supported by early career research grant with project ref. ECR/2017/000931 and IISER Bhopal. This work is funded by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT - Portuguese Foundation for Science and Technology under the projects number POCI-01-0145-FEDER-007688, 5 This work also received funding from the European Community H2020 program under grant agreement No. 716510 (ERC-2016-STG TREND), and No. 692373 (BET-EU).

PY - 2021

Y1 - 2021

N2 - This paper presents a novel mostly passive ∆-Σ ADC using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs). The ADC circuit consists of passive elements (resistors and capacitors), a novel dynamic comparator, a D-Flip Flop and a pseudo-CMOS BS inverter. In-house oxide TFT model is used for circuit simulations in Cadence environment. The proposed ADC results in effective-number-of-bits (ENOB) of 11.2 bits and a figure-of-merit (FOM) of 0.15 µJ/conversion step at 2 kHz sampling frequency with a 10 V power supply. This circuit would find potential applications in biomedical wearable systems, in which, the ADC is probably the most important block.

AB - This paper presents a novel mostly passive ∆-Σ ADC using amorphous Indium Gallium Zinc Oxide (a-IGZO) thin-film transistors (TFTs). The ADC circuit consists of passive elements (resistors and capacitors), a novel dynamic comparator, a D-Flip Flop and a pseudo-CMOS BS inverter. In-house oxide TFT model is used for circuit simulations in Cadence environment. The proposed ADC results in effective-number-of-bits (ENOB) of 11.2 bits and a figure-of-merit (FOM) of 0.15 µJ/conversion step at 2 kHz sampling frequency with a 10 V power supply. This circuit would find potential applications in biomedical wearable systems, in which, the ADC is probably the most important block.

KW - Delta-Sigma ADC

KW - a-IGZO TFTs

KW - Dynamic Comparator

KW - D-Flip Flop

KW - Pseudo-CMOS BS Inverter

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U2 - 10.1109/ISCAS51556.2021.09401704

DO - 10.1109/ISCAS51556.2021.09401704

M3 - Conference contribution

AN - SCOPUS:85109012889

SN - 978-1-7281-9201-7

T3 - Proceedings - IEEE International Symposium on Circuits and Systems

SP - 1

EP - 6

BT - 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings

PB - Institute of Electrical and Electronics Engineers (IEEE)

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ER -

Wadhwa N, Bahubalindruni P , Correia A , Goes J, Deb S, Barquinha P. Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics. In 2021 IEEE International Symposium on Circuits and Systems, ISCAS 2021 - Proceedings. New York, USA: Institute of Electrical and Electronics Engineers (IEEE). 2021. p. 1-6. 9401704. (Proceedings - IEEE International Symposium on Circuits and Systems). doi: 10.1109/ISCAS51556.2021.09401704

Mostly passive ∆ − σ ADC with a-IGZO TFTs for flexible electronics

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