Two-step beat frequency quantizer based ADC with adaptive reference control for low swing bio-potential signals

Somnath Kundu; Bongjin Kim; Chris H. Kim

doi:10.1109/CICC.2015.7338382

Two-step beat frequency quantizer based ADC with adaptive reference control for low swing bio-potential signals

Somnath Kundu, Bongjin Kim, Chris H. Kim

Electrical and Computer Engineering

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

7 Scopus citations

Abstract

A two-step fully digital beat frequency quantizer based continuous time ADC is demonstrated in a 65nm test chip to achieve high resolution (6-7 ENOB) for direct conversion of low swing (<10mV) bio-potential signals. The resolution of ADC can be adaptively controlled depending on the input signal swing. A triple-sampling technique generates a synchronous ADC output from an asynchronous beat frequency quantizer. The proposed two-step ADC achieves a 44.5dB SNDR which is 5.6dB higher than the previously proposed single step architecture for a 10mVpp, 300Hz differential input signal.

Original language	English (US)
Title of host publication	2015 IEEE Custom Integrated Circuits Conference, CICC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479986828
DOIs	https://doi.org/10.1109/CICC.2015.7338382
State	Published - Nov 25 2015
Event	IEEE Custom Integrated Circuits Conference, CICC 2015 - San Jose, United States Duration: Sep 28 2015 → Sep 30 2015

Publication series

Name	Proceedings of the Custom Integrated Circuits Conference
Volume	2015-November
ISSN (Print)	0886-5930

Other

Other	IEEE Custom Integrated Circuits Conference, CICC 2015
Country/Territory	United States
City	San Jose
Period	9/28/15 → 9/30/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

Keywords

analog to digital converter
beat frequency
bio-potential
two-step
voltage-controlled oscillator

Publisher link

10.1109/CICC.2015.7338382

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Kundu, S., Kim, B., & Kim, C. H. (2015). Two-step beat frequency quantizer based ADC with adaptive reference control for low swing bio-potential signals. In 2015 IEEE Custom Integrated Circuits Conference, CICC 2015 Article 7338382 (Proceedings of the Custom Integrated Circuits Conference; Vol. 2015-November). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC.2015.7338382

Two-step beat frequency quantizer based ADC with adaptive reference control for low swing bio-potential signals. / Kundu, Somnath; Kim, Bongjin; Kim, Chris H.
2015 IEEE Custom Integrated Circuits Conference, CICC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7338382 (Proceedings of the Custom Integrated Circuits Conference; Vol. 2015-November).

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

Kundu, S, Kim, B & Kim, CH 2015, Two-step beat frequency quantizer based ADC with adaptive reference control for low swing bio-potential signals. in 2015 IEEE Custom Integrated Circuits Conference, CICC 2015., 7338382, Proceedings of the Custom Integrated Circuits Conference, vol. 2015-November, Institute of Electrical and Electronics Engineers Inc., IEEE Custom Integrated Circuits Conference, CICC 2015, San Jose, United States, 9/28/15. https://doi.org/10.1109/CICC.2015.7338382

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abstract = "A two-step fully digital beat frequency quantizer based continuous time ADC is demonstrated in a 65nm test chip to achieve high resolution (6-7 ENOB) for direct conversion of low swing (<10mV) bio-potential signals. The resolution of ADC can be adaptively controlled depending on the input signal swing. A triple-sampling technique generates a synchronous ADC output from an asynchronous beat frequency quantizer. The proposed two-step ADC achieves a 44.5dB SNDR which is 5.6dB higher than the previously proposed single step architecture for a 10mVpp, 300Hz differential input signal.",

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Two-step beat frequency quantizer based ADC with adaptive reference control for low swing bio-potential signals

Abstract

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