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Open AccessArticle

K-Band Low Phase Noise VCO Based on Q-Boosted Switched Inductor

1
State Key Lab of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
2
Key Laboratory of RF Circuits and Systems of Ministry of Education, School of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(10), 1132; https://doi.org/10.3390/electronics8101132
Received: 13 September 2019 / Revised: 4 October 2019 / Accepted: 5 October 2019 / Published: 8 October 2019
(This article belongs to the Special Issue Nanoscale CMOS Technologies)
In this article, the development of the K-band low phase noise voltage-controlled oscillator (VCO) based on Q-boosted switched inductor is presented. Compared with the conventional switched inductor, the eddy current will be decreased using a 2-turn secondary coil, and then the dissipated power from the switch on-resistance will also be decreased, leading to a boosted inductor Q at switch ON-state. The equivalent inductance, quality factor, and self-resonance frequency at switch ON/OFF states are analyzed and derived. For comparison, K-band VCOs have been designed and fabricated in a 130nm BiCMOS process with the Q-boosted and conventional switched inductors. Measured results show that the phase noise has been typically improved by 2–5dB at 100 kHz and 1 MHz offset at switch ON-state, using the Q-boosted switched inductor. View Full-Text
Keywords: K-band; quality factor; phase noise; switched inductor; voltage-controlled oscillator K-band; quality factor; phase noise; switched inductor; voltage-controlled oscillator
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MDPI and ACS Style

Chen, Z.; Chen, J.-X.; Yan, P.; Hou, D.; Zhu, F. K-Band Low Phase Noise VCO Based on Q-Boosted Switched Inductor. Electronics 2019, 8, 1132.

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