A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity

A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity

A process, voltage, and temperature insensitive resistor-to-frequency converter is proposed. This insensitivity is achieved by matching the current-defining capacitor in a novel switched-capacitor (SC) voltage-to-current (V-I) converter with the integrating capacitor in a conventional relaxation osc...

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Main Authors: Koay, Kuan Chuang, Chan, Pak Kwong
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2019
Subjects:
Switched-capacitor Circuit
Engineering::Electrical and electronic engineering
Transconductor
Online Access:https://hdl.handle.net/10356/105578
http://hdl.handle.net/10220/50161
http://dx.doi.org/10.1109/JSEN.2018.2846635
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1055782019-12-06T21:53:51Z A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity Koay, Kuan Chuang Chan, Pak Kwong School of Electrical and Electronic Engineering Switched-capacitor Circuit Engineering::Electrical and electronic engineering Transconductor A process, voltage, and temperature insensitive resistor-to-frequency converter is proposed. This insensitivity is achieved by matching the current-defining capacitor in a novel switched-capacitor (SC) voltage-to-current (V-I) converter with the integrating capacitor in a conventional relaxation oscillator. Implemented in 0.18-μm CMOS technology, the SC V-I converter together with the relaxation oscillator and voltage regulator occupies 0.45 mm 2 . This paper has shown a sensitivity of 199.9 Hz/(μQ/Q), which is based on a center frequency of 125 kHz. Testing with a commercial sensor, the sensor interface has demonstrated a sensitivity of 1.269 kHz/psi. The sensor interface consumes only 112.5 μW at 1.5-V power supply. Therefore, it is suitable for Internet-of-Things applications. Accepted version 2019-10-15T09:00:12Z 2019-12-06T21:53:51Z 2019-10-15T09:00:12Z 2019-12-06T21:53:51Z 2018 Journal Article Koay, K. C., & Chan, P. K. (2018). A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity. IEEE Sensors Journal, 18(15), 6245-6253. doi:10.1109/JSEN.2018.2846635 1530-437X https://hdl.handle.net/10356/105578 http://hdl.handle.net/10220/50161 http://dx.doi.org/10.1109/JSEN.2018.2846635 en IEEE Sensors Journal © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/JSEN.2018.2846635 9 p. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Switched-capacitor Circuit
Engineering::Electrical and electronic engineering
Transconductor
spellingShingle Switched-capacitor Circuit
Engineering::Electrical and electronic engineering
Transconductor
Koay, Kuan Chuang
Chan, Pak Kwong
A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity
description A process, voltage, and temperature insensitive resistor-to-frequency converter is proposed. This insensitivity is achieved by matching the current-defining capacitor in a novel switched-capacitor (SC) voltage-to-current (V-I) converter with the integrating capacitor in a conventional relaxation oscillator. Implemented in 0.18-μm CMOS technology, the SC V-I converter together with the relaxation oscillator and voltage regulator occupies 0.45 mm 2 . This paper has shown a sensitivity of 199.9 Hz/(μQ/Q), which is based on a center frequency of 125 kHz. Testing with a commercial sensor, the sensor interface has demonstrated a sensitivity of 1.269 kHz/psi. The sensor interface consumes only 112.5 μW at 1.5-V power supply. Therefore, it is suitable for Internet-of-Things applications.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Koay, Kuan Chuang
Chan, Pak Kwong
format Article
author Koay, Kuan Chuang
Chan, Pak Kwong
author_sort Koay, Kuan Chuang
title A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity
title_short A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity
title_full A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity
title_fullStr A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity
title_full_unstemmed A 0.18-μm CMOS voltage-to-frequency converter with low circuit sensitivity
title_sort 0.18-μm cmos voltage-to-frequency converter with low circuit sensitivity
publishDate 2019
url https://hdl.handle.net/10356/105578
http://hdl.handle.net/10220/50161
http://dx.doi.org/10.1109/JSEN.2018.2846635
_version_ 1681039471584215040

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