A 0.4-V 410-nW opamp-less continuous-time ΣΔ modulator for biomedical applications

João L. A. De Melo; Fábio Querido; Nuno Filipe Silva Veríssimo Paulino; João Carlos da Palma Goes

doi:10.1109/ISCAS.2014.6865391

A 0.4-V 410-nW opamp-less continuous-time ΣΔ modulator for biomedical applications

João L. A. De Melo, Fábio Querido, Nuno Filipe Silva Veríssimo Paulino, João Carlos da Palma Goes

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

19 Citations (Scopus)

Abstract

A 0.4-V opamp-less ΣΔ modulator for biomedical applications is presented. The continuous-time (CT) 2nd order ΣΔ modulator is realized using a passive filter topology. In order to obtain a small area, all capacitors are realized using parallel compensated depletion-mode MOSCAPs. To maximize the performance, genetic algorithms (GAs) are used to optimize the circuit for smaller area and higher signal-to-noise-plus-distortion ratio (SNDR). In the dynamic comparator, which is the only active block in the circuit, bulk-driven technique is used to obtain lower supply voltage operation. The circuit was designed in a 130 nm CMOS technology and, using a clock frequency of 2 MHz, has a bandwidth of 10 kHz to cover the most common bio-potential signals. The electrical transient noise simulation results show that the circuit achieves a peak SNDR of 58 dB and a dynamic range of 64 dB while dissipating only 410 nW, which corresponds to an energy efficiency of 32 fJ/conv.-step.XX

Original language	English
Title of host publication	2014 IEEE International Symposium on Circuits and Systems (ISCAS)
Pages	1340 - 1343
ISBN (Electronic)	978-1-4799-3432-4
DOIs	https://doi.org/10.1109/ISCAS.2014.6865391
Publication status	Published - 2014
Event	2014 IEEE International Symposium on Circuits and Systems (ISCAS) - Duration: 1 Jan 2014 → …

Conference

Conference	2014 IEEE International Symposium on Circuits and Systems (ISCAS)
Period	1/01/14 → …

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1109/ISCAS.2014.6865391

Cite this

@inproceedings{b40bbb52b5c44382a14ef1231fd01c57,

title = "A 0.4-V 410-nW opamp-less continuous-time ΣΔ modulator for biomedical applications",

abstract = "A 0.4-V opamp-less ΣΔ modulator for biomedical applications is presented. The continuous-time (CT) 2nd order ΣΔ modulator is realized using a passive filter topology. In order to obtain a small area, all capacitors are realized using parallel compensated depletion-mode MOSCAPs. To maximize the performance, genetic algorithms (GAs) are used to optimize the circuit for smaller area and higher signal-to-noise-plus-distortion ratio (SNDR). In the dynamic comparator, which is the only active block in the circuit, bulk-driven technique is used to obtain lower supply voltage operation. The circuit was designed in a 130 nm CMOS technology and, using a clock frequency of 2 MHz, has a bandwidth of 10 kHz to cover the most common bio-potential signals. The electrical transient noise simulation results show that the circuit achieves a peak SNDR of 58 dB and a dynamic range of 64 dB while dissipating only 410 nW, which corresponds to an energy efficiency of 32 fJ/conv.-step.XX",

author = "{De Melo}, {Jo{\~a}o L. A.} and F{\'a}bio Querido and Paulino, {Nuno Filipe Silva Ver{\'i}ssimo} and Goes, {Jo{\~a}o Carlos da Palma}",

note = "This work was supported by the Portuguese Foundation for Science and Technology (CTS multiannual funding) through the PIDDAC Program funds, projects DISRUPTIVE (EXCL/EEI-ELC/0261/2012) and PEST (PESTOE/EEI/UI0066/2011) and also through Ph.D. Grant (SFRH/BD/72362/2010).; 2014 IEEE International Symposium on Circuits and Systems (ISCAS) ; Conference date: 01-01-2014",

year = "2014",

doi = "10.1109/ISCAS.2014.6865391",

language = "English",

isbn = "978-1-4799-3431-7",

pages = "1340 -- 1343",

booktitle = "2014 IEEE International Symposium on Circuits and Systems (ISCAS)",

}

A 0.4-V 410-nW opamp-less continuous-time ΣΔ modulator for biomedical applications. / De Melo, João L. A.; Querido, Fábio; Paulino, Nuno Filipe Silva Veríssimo et al.
2014 IEEE International Symposium on Circuits and Systems (ISCAS). 2014. p. 1340 - 1343 6865391.

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

TY - GEN

T1 - A 0.4-V 410-nW opamp-less continuous-time ΣΔ modulator for biomedical applications

AU - De Melo, João L. A.

AU - Querido, Fábio

AU - Paulino, Nuno Filipe Silva Veríssimo

AU - Goes, João Carlos da Palma

N1 - This work was supported by the Portuguese Foundation for Science and Technology (CTS multiannual funding) through the PIDDAC Program funds, projects DISRUPTIVE (EXCL/EEI-ELC/0261/2012) and PEST (PESTOE/EEI/UI0066/2011) and also through Ph.D. Grant (SFRH/BD/72362/2010).

PY - 2014

Y1 - 2014

N2 - A 0.4-V opamp-less ΣΔ modulator for biomedical applications is presented. The continuous-time (CT) 2nd order ΣΔ modulator is realized using a passive filter topology. In order to obtain a small area, all capacitors are realized using parallel compensated depletion-mode MOSCAPs. To maximize the performance, genetic algorithms (GAs) are used to optimize the circuit for smaller area and higher signal-to-noise-plus-distortion ratio (SNDR). In the dynamic comparator, which is the only active block in the circuit, bulk-driven technique is used to obtain lower supply voltage operation. The circuit was designed in a 130 nm CMOS technology and, using a clock frequency of 2 MHz, has a bandwidth of 10 kHz to cover the most common bio-potential signals. The electrical transient noise simulation results show that the circuit achieves a peak SNDR of 58 dB and a dynamic range of 64 dB while dissipating only 410 nW, which corresponds to an energy efficiency of 32 fJ/conv.-step.XX

AB - A 0.4-V opamp-less ΣΔ modulator for biomedical applications is presented. The continuous-time (CT) 2nd order ΣΔ modulator is realized using a passive filter topology. In order to obtain a small area, all capacitors are realized using parallel compensated depletion-mode MOSCAPs. To maximize the performance, genetic algorithms (GAs) are used to optimize the circuit for smaller area and higher signal-to-noise-plus-distortion ratio (SNDR). In the dynamic comparator, which is the only active block in the circuit, bulk-driven technique is used to obtain lower supply voltage operation. The circuit was designed in a 130 nm CMOS technology and, using a clock frequency of 2 MHz, has a bandwidth of 10 kHz to cover the most common bio-potential signals. The electrical transient noise simulation results show that the circuit achieves a peak SNDR of 58 dB and a dynamic range of 64 dB while dissipating only 410 nW, which corresponds to an energy efficiency of 32 fJ/conv.-step.XX

U2 - 10.1109/ISCAS.2014.6865391

DO - 10.1109/ISCAS.2014.6865391

M3 - Conference contribution

SN - 978-1-4799-3431-7

SP - 1340

EP - 1343

BT - 2014 IEEE International Symposium on Circuits and Systems (ISCAS)

T2 - 2014 IEEE International Symposium on Circuits and Systems (ISCAS)

Y2 - 1 January 2014

ER -

A 0.4-V 410-nW opamp-less continuous-time ΣΔ modulator for biomedical applications

Abstract

Conference

UN SDGs

Access to Document

Fingerprint

Cite this