A Simulated Design of a Ring Oscillator with Phase Noise of -104.3 dBc/Hz@1MHz

Shuyi Wang

doi:10.54254/2755-2721/2025.24594

Applied and Computational EngineeringOpen access

A Simulated Design of a Ring Oscillator with Phase Noise of -104.3 dBc/Hz@1MHz

Research Article

Open Access

A Simulated Design of a Ring Oscillator with Phase Noise of -104.3 dBc/Hz@1MHz

Shuyi Wang ^1*

¹ Nanjing University of Information Science and Technology, 219 Ningliu Road, Pukou District, Nanjing, Jiangsu Province, China

^*Corresponding author: 15862845902@163.com

Published on 4 July 2025

ACE Vol.170

ISSN (Print): 2755-273X

ISSN (Online): 2755-2721

ISBN (Print): 978-1-80590-217-1

ISBN (Online): 978-1-80590-218-8

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Abstract

This paper presents the design of a fifth-order ring voltage-controlled oscillator (VCO) featuring low phase noise, based on the TSMC 65nm CMOS RF process. The design employs a low-noise inverter amplifier to replace the conventional inverter, thereby enhancing the performance of the ring oscillator. Simulations were carried out using Cadence Virtuoso. The results show that under a tunable control voltage ranging from 0.7V to 1.3V, the oscillator achieves a frequency tuning range of 108 MHz to 203 MHz. At a resonant frequency of 203 MHz, the phase noise is -83.6 dBc/Hz@100 kHz and -104.3 dBc/Hz@1 MHz. The typical power consumption at room temperature is 30.3 μW.

Keywords:

Ring Oscillator, Voltage-controlled Oscillator, Phase Noise, TSMC 65nm

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References

[1]. Abd Ghani, A. A., & Saparon, A. (2007, December 11–12). A 1.4 GHz CMOS low-phase noise voltage-controlled ring oscillator. In Proceedings of the 5th Student Conference on Research and Development (SCOReD 2007), Malaysia.

[2]. Suman, S., Bhardwaj, M., & Singh, B. P. (2012). An improved performance ring oscillator design. In Proceedings of the 2012 Second International Conference on Advanced Computing & Communication Technologies.

[3]. Ghafari, B., Koushaeian, L., Goodarzy, F., Evans, R., & Skafidas, E. (2013). An ultra-low-power and low-noise voltage-controlled ring oscillator for biomedical applications. In Proceedings of IEEE TENCON - Spring 2013.

[4]. Kim, J.-M., Kim, S., Lee, I.-Y., Han, S.-K., & Lee, S.-G. (2013). A low-noise four-stage voltage-controlled ring oscillator in deep-submicrometer CMOS technology. IEEE Transactions on Circuits and Systems II: Express Briefs, 60(2), 85–89.

[5]. Esmaeilzadeh, M., Audet, Y., Ali, M., & Sawa, M. (2022). A low-phase-noise CMOS ring voltage-controlled oscillator intended for time-based sensor interfaces. IEEE Access, 10, 101186–101197.

References

[5]. Esmaeilzadeh, M., Audet, Y., Ali, M., & Sawa, M. (2022). A low-phase-noise CMOS ring voltage-controlled oscillator intended for time-based sensor interfaces. IEEE Access, 10, 101186–101197.

Cite this article

Wang,S. (2025). A Simulated Design of a Ring Oscillator with Phase Noise of -104.3 dBc/Hz@1MHz. Applied and Computational Engineering,170,8-13.

Data availability

The datasets used and/or analyzed during the current study will be available from the authors upon reasonable request.

About volume

Volume title: Proceedings of the 3rd International Conference on Mechatronics and Smart Systems

ISBN: 978-1-80590-217-1(Print) / 978-1-80590-218-8(Online)

Editor: Mian Umer Shafiq

Conference website: https://2025.confmss.org/

Conference date: 16 June 2025

Series: Applied and Computational Engineering

Volume number: Vol.170

ISSN: 2755-2721(Print) / 2755-273X(Online)

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