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Title: Design and analysis of a K-band wideband voltage-controlled oscillator with robust start-up and frequency boost
Authors: Sun, Junyi
Boon, Chirn Chye
Yi, Xiang
Lim, Wei Meng
Meng, Fanyi
Keywords: Wideband
Evenly distributed auxiliary cross-coupled pairs
Issue Date: 2015
Source: Sun, J., Boon, C. C., Yi, X., Lim, W. M., & Meng, F. (2015). Design and analysis of a K-band wideband voltage-controlled oscillator with robust start-up and frequency boost. IET Microwaves, Antennas & Propagation, 9(14), 1623-1631.
Series/Report no.: IET Microwaves, Antennas & Propagation
Abstract: This study presents a K-band differential voltage-controlled oscillator (VCO) with robust start-up. A hybrid technique that combines open-loop digitally controlled tail current with switchable auxiliary cross-coupled pairs (ACCPs) is proposed to ensure robust start-up for wideband operation. Compared with prior closed-loop current controlling method, the proposed technique does not suffer from phase-noise degradation. Furthermore, by evenly distributing the ACCPs, transistors with smaller size are allowed to achieve the same start-up condition, which leads to frequency boost and phase-noise improvement. Implemented in 0.18 μm complementary metal-oxide-semiconductor technology, the VCO achieves a wide-frequency tuning range of 21.4-26.29 GHz (20.5%) and a low phase noise of -108.8 dBc/Hz at 1 MHz offset from 25.8 GHz carrier frequency. At 1.1 V power supply, the power consumption of the core circuit is 7.9-11.4 mW across the entire output frequency range.
ISSN: 1751-8725
DOI: 10.1049/iet-map.2014.0825
Schools: School of Electrical and Electronic Engineering 
Rights: © 2015 The Institution of Engineering and Technology. This is the author created version of a work that has been peer reviewed and accepted for publication by IET Microwaves, Antennas & Propagation, The Institution of Engineering and Technology. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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