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Title: A 16.6 μW 3.12 MHz RC relaxation oscillator with 160.3 dBc/Hz FOM
Authors: Zhou, Wei
Goh, Wang Ling
Cheong, Jia Hao
Gao, Yuan
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Zhou, W., Goh, W. L., Cheong, J. H., & Gao, Y. (2018). A 16.6 μW 3.12 MHz RC relaxation oscillator with 160.3 dBc/Hz FOM. IEEE International Symposium on Circuits and Systems (ISCAS), 1-5. doi:10.1109/ISCAS.2018.8350902
Conference: 2018 IEEE International Symposium on Circuits and Systems (ISCAS)
Abstract: This paper presents a new RC relaxation oscillator for biomedical sensor interface circuit. A novel switch-capacitor based RC charging/discharging circuit is proposed to effectively improve the oscillator phase noise and power performance. The inverter-based comparator with replica biasing is employed and optimized to enhance the phase noise performance and to lower output dependence on the supply voltage variation. The oscillator's temperature insensitivity is also improved by resistor temperature compensation. The prototype RC relaxation oscillator circuit is designed in a commercial 65nm CMOS process. The post-layout simulation results showed 3.12 MHz output frequency, -112dBc/Hz phase noise at 100 kHz offset, and 16.6 μW power consumption under 1 V supply voltage. The frequency variation is ±0.294%/V for supply within 1 V to 1.6 V, and 11.31 ppm/°C for temperature across -40°C to 100°C. The overall circuit performance is compared favorably to the state-of-art designs, with an outstanding Figure of Merit (FOM) of 160.03 dBc/Hz at 100 kHz.
ISBN: 9781538648810
DOI: 10.1109/ISCAS.2018.8350902
Schools: School of Electrical and Electronic Engineering 
Rights: © 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:
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Conference Papers

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