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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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Online Access: | https://hdl.handle.net/10356/105578 http://hdl.handle.net/10220/50161 http://dx.doi.org/10.1109/JSEN.2018.2846635 |
| _version_ | 1811684925613539328 |
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| author | Koay, Kuan Chuang Chan, Pak Kwong |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Koay, Kuan Chuang Chan, Pak Kwong |
| author_sort | Koay, Kuan Chuang |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T04:36:22Z |
| format | Journal Article |
| id | ntu-10356/105578 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:36:22Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| title | 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_short | 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 |
| topic | Switched-capacitor Circuit Engineering::Electrical and electronic engineering Transconductor |
| url | 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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