University of Oulu

Y. Shafiullah et al., "108 and 124 GHz Fundamental VCOs with 21% and 7% DC-to-RF Efficiency in 22nm CMOS FDSOI," 2022 17th European Microwave Integrated Circuits Conference (EuMIC), Milan, Italy, 2022, pp. 256-259, doi: 10.23919/EuMIC54520.2022.9923508.

108 and 124 GHz fundamental VCOs with 21% and 7% DC-to-RF efficiency in 22nm CMOS FDSOI

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Author: Shafiullah, Yasir1; Hietanen, Mikko1; Leinonen, Marko E.1;
Organizations: 1University of Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 4.3 MB)
Persistent link:
Language: English
Published: Institute of Electrical and Electronics Engineers, 2022
Publish Date: 2023-02-06


This paper presents the design of two high efficiency fundamental voltage controlled oscillators (VCO) for sub-THz applications. The design optimizes the transistor for voltage gain, swing and PAE at the operating frequency to achieve 21% and 7% DC-to-RF efficiencies. The varactor and back-gate voltages are utilized for tuning control. The back-gate controls improves the relative tuning range of the VCOs by ∼ 50%. Layout techniques are employed in the transistor and inductor to improve the VCO frequency. The two VCOs are implemented in 22nm CMOS FDSOI, oscillate at 108.7 GHz and 124 GHz having an output power of 3.41 and −1.45 dBm with a tuning range of 3.4% and 3.7%, respectively. The chip operates at a supply voltage of 0.7V and an IBIAS of 1.4mA with a core power consumption of 10.2mW and 9.9mW, respectively. The active area is 0.095x0.087 mm².

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ISBN: 978-2-87487-070-5
Pages: 256 - 259
DOI: 10.23919/eumic54520.2022.9923508
Host publication: 2022 17th European Microwave Integrated Circuits Conference (EuMIC)
Conference: European Microwave Integrated Circuits Conference
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 the Academy of Finland 6Genesis Flagship (grant 318927). GLOBALFOUNDRIES are acknowledged for technology access. Keysight technologies are acknowledged for measurement equipment donation.
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
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