A VCO-Based ADC with Relaxation Oscillator for Biomedical Applications

Olaitan Olabode; Antti Ontronen; Vishnu Unnikrishnan; Marko Kosunen; Jussi Ryynänen

doi:10.1109/ICECS.2018.8617935

A VCO-Based ADC with Relaxation Oscillator for Biomedical Applications

Olaitan Olabode, Antti Ontronen, Vishnu Unnikrishnan, Marko Kosunen, Jussi Ryynänen

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

3 Citations (Scopus)

369 Downloads (Pure)

Abstract

This paper describes a voltage controlled oscillator(VCO) -based ADC for biomedical applications which employs a relaxation oscillator for voltage-to-frequency conversion. The proposed circuit uses a redundant pair of capacitors to mitigate the conversion error resulting from the time required for resetting the capacitor. A switch matrix with feedback helps sustain oscillations. Further, the VCO frequency approaches zero as the input voltage approaches zero unlike a converter with ring oscillator, thereby reducing power consumption. Post-layout simulation of the proposed ADC designed with a 28 nm FDSOI CMOS technology shows an ENOB of 8 and power consumption of 12 uW from a 0.7 V supply.

Original language	English
Title of host publication	2018 IEEE International Conference on Electronics Circuits and Systems
Publisher	IEEE
Pages	861 - 864
Number of pages	4
ISBN (Electronic)	978-1-5386-9562-3
ISBN (Print)	978-1-5386-9116-8
DOIs	https://doi.org/10.1109/ICECS.2018.8617935
Publication status	Published - 2018
MoE publication type	A4 Conference publication
Event	IEEE International Conference on Electronics Circuits and Systems - Bordeaux, France Duration: 9 Dec 2018 → 12 Dec 2018 https://www.ieee-icecs2018.org/

Conference

Conference	IEEE International Conference on Electronics Circuits and Systems
Abbreviated title	ICECS
Country/Territory	France
City	Bordeaux
Period	09/12/2018 → 12/12/2018
Internet address	https://www.ieee-icecs2018.org/

Keywords

VCO
ADC
relaxation oscillator
voltage-to-frequency
biomedical applications

Access to Document

10.1109/ICECS.2018.8617935

A VCO-Based ADC with Relaxation Oscillator for Biomedical ApplicationsAccepted author manuscript, 379 KB

Aalto Electronics-ICT
Ryynänen, J. (Manager)
Department of Electronics and Nanoengineering
Facility/equipment: Facility

Cite this

@inproceedings{9a47b20514674d78baceb80d95a872db,

title = "A VCO-Based ADC with Relaxation Oscillator for Biomedical Applications",

abstract = "This paper describes a voltage controlled oscillator(VCO) -based ADC for biomedical applications which employs a relaxation oscillator for voltage-to-frequency conversion. The proposed circuit uses a redundant pair of capacitors to mitigate the conversion error resulting from the time required for resetting the capacitor. A switch matrix with feedback helps sustain oscillations. Further, the VCO frequency approaches zero as the input voltage approaches zero unlike a converter with ring oscillator, thereby reducing power consumption. Post-layout simulation of the proposed ADC designed with a 28 nm FDSOI CMOS technology shows an ENOB of 8 and power consumption of 12 uW from a 0.7 V supply.",

keywords = "VCO, ADC, relaxation oscillator, voltage-to-frequency, biomedical applications",

author = "Olaitan Olabode and Antti Ontronen and Vishnu Unnikrishnan and Marko Kosunen and Jussi Ryyn{\"a}nen",

year = "2018",

doi = "10.1109/ICECS.2018.8617935",

language = "English",

isbn = "978-1-5386-9116-8",

pages = "861 -- 864",

booktitle = "2018 IEEE International Conference on Electronics Circuits and Systems",

publisher = "IEEE",

address = "United States",

note = "IEEE International Conference on Electronics Circuits and Systems, ICECS ; Conference date: 09-12-2018 Through 12-12-2018",

url = "https://www.ieee-icecs2018.org/",

}

Olabode, O, Ontronen, A, Unnikrishnan, V, Kosunen, M & Ryynänen, J 2018, A VCO-Based ADC with Relaxation Oscillator for Biomedical Applications. in 2018 IEEE International Conference on Electronics Circuits and Systems. IEEE, pp. 861 - 864, IEEE International Conference on Electronics Circuits and Systems, Bordeaux, France, 09/12/2018. https://doi.org/10.1109/ICECS.2018.8617935

TY - GEN

T1 - A VCO-Based ADC with Relaxation Oscillator for Biomedical Applications

AU - Olabode, Olaitan

AU - Ontronen, Antti

AU - Unnikrishnan, Vishnu

AU - Kosunen, Marko

AU - Ryynänen, Jussi

PY - 2018

Y1 - 2018

N2 - This paper describes a voltage controlled oscillator(VCO) -based ADC for biomedical applications which employs a relaxation oscillator for voltage-to-frequency conversion. The proposed circuit uses a redundant pair of capacitors to mitigate the conversion error resulting from the time required for resetting the capacitor. A switch matrix with feedback helps sustain oscillations. Further, the VCO frequency approaches zero as the input voltage approaches zero unlike a converter with ring oscillator, thereby reducing power consumption. Post-layout simulation of the proposed ADC designed with a 28 nm FDSOI CMOS technology shows an ENOB of 8 and power consumption of 12 uW from a 0.7 V supply.

AB - This paper describes a voltage controlled oscillator(VCO) -based ADC for biomedical applications which employs a relaxation oscillator for voltage-to-frequency conversion. The proposed circuit uses a redundant pair of capacitors to mitigate the conversion error resulting from the time required for resetting the capacitor. A switch matrix with feedback helps sustain oscillations. Further, the VCO frequency approaches zero as the input voltage approaches zero unlike a converter with ring oscillator, thereby reducing power consumption. Post-layout simulation of the proposed ADC designed with a 28 nm FDSOI CMOS technology shows an ENOB of 8 and power consumption of 12 uW from a 0.7 V supply.

KW - VCO

KW - ADC

KW - relaxation oscillator

KW - voltage-to-frequency

KW - biomedical applications

U2 - 10.1109/ICECS.2018.8617935

DO - 10.1109/ICECS.2018.8617935

M3 - Conference article in proceedings

SN - 978-1-5386-9116-8

SP - 861

EP - 864

BT - 2018 IEEE International Conference on Electronics Circuits and Systems

PB - IEEE

T2 - IEEE International Conference on Electronics Circuits and Systems

Y2 - 9 December 2018 through 12 December 2018

ER -

A VCO-Based ADC with Relaxation Oscillator for Biomedical Applications

Abstract

Conference

Keywords

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Equipment

Aalto Electronics-ICT

Cite this