University of Oulu

Cheung, T. H., Ryynänen, J., Pärssinen, A. & Stadius, K. (2021). A 5.4-GHz 2/3/4-modulus fractional frequency divider circuit in 28-nm CMOS. In 2021 IEEE International Symposium on Circuits and Systems (ISCAS) : proceedings, 9401405.

A 5.4-GHz 2/3/4-modulus fractional frequency divider circuit in 28-nm CMOS

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Author: Cheung, Tze Hin1; Ryynänen, Jussi2; Pärssinen, Aarno3;
Organizations: 1Dept. of Electronics and Nanoengineering, Aalto University, Finland
2Aalto University, Espoo, Finland
3Oulu University, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.3 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2021
Publish Date: 2021-12-27


This paper describes the design and post-layout simulations of a 2/3/4- modulus frequency divider circuit, accompanied with an accumulator that controls the division count. The circuit is capable of operating as an integer or as a fractional divider. Key topic of this paper is the merging of div-2/3 and div-3/4 circuits into a single compact circuit that solves an issue of a forbidden state in fractional-division operation. The circuit is designed with 28-nm CMOS technology and the post-layout simulations indicate an operating input frequency range of 0.3 – 5.4 GHz with 13-bit fractional frequency resolution between division ratios of 2–4. The divider occupies only 40 µm x 30 µm while consuming 2.0 mW at 5.4 GHz input frequency.

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Series: IEEE International Symposium on Circuits and Systems proceedings
ISSN: 0271-4302
ISSN-E: 2158-1525
ISSN-L: 0271-4302
ISBN Print: 978-1-7281-9201-7
Article number: 9401405
DOI: 10.1109/ISCAS51556.2021.9401405
Host publication: 2021 IEEE International Symposium on Circuits and Systems (ISCAS), Daegu, Korea May 22-28, 2021 : proceedings
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This research has been financially supported by Academy of Finland (grant 2430226211).
Academy of Finland Grant Number: 2430226211
Detailed Information: 2430226211 (Academy of Finland Funding decision)
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