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Article

Low Phase Noise and Wide-Range Class-C VCO Using Auto-Adaptive Bias Technique

Department of Electrical and Engineering, Chung-Ang University, Seoul 06974, Korea
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Author to whom correspondence should be addressed.
Electronics 2020, 9(8), 1290; https://doi.org/10.3390/electronics9081290
Received: 2 July 2020 / Revised: 7 August 2020 / Accepted: 8 August 2020 / Published: 11 August 2020
(This article belongs to the Special Issue 5G Front-End Transceivers)
This paper proposes a new structure of 24-GHz class-C voltage-controlled oscillator (VCO) using an auto-adaptive bias technique. The VCO in this paper uses a digitally controlled circuit to eliminate the possibility of start-up failure that a class-C structure can have and has low phase noise and a wide frequency range. To expand the frequency tuning range, a 3-bit cap-bank is used and a triple-coupled transformer is used as the core inductor. The proposed class-C VCO implements a 65-nm RF CMOS process. It has a phase noise performance of −105 dBc/Hz or less at 1-MHz offset frequency and the output frequency range is from 22.8 GHz to 27.3 GHz, which consumes 8.3–10.6 mW of power. The figure-of-merit with tuning range (FoMT) of this design reached 191.1 dBc/Hz. View Full-Text
Keywords: RF; CMOS; Class-C; voltage-controlled oscillator (VCO); auto-adaptive bias; phase noise; wide-range RF; CMOS; Class-C; voltage-controlled oscillator (VCO); auto-adaptive bias; phase noise; wide-range
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MDPI and ACS Style

Lee, J.-Y.; Kim, G.S.; Ko, G.-H.; Oh, K.-I.; Park, J.G.; Baek, D. Low Phase Noise and Wide-Range Class-C VCO Using Auto-Adaptive Bias Technique. Electronics 2020, 9, 1290. https://doi.org/10.3390/electronics9081290

AMA Style

Lee J-Y, Kim GS, Ko G-H, Oh K-I, Park JG, Baek D. Low Phase Noise and Wide-Range Class-C VCO Using Auto-Adaptive Bias Technique. Electronics. 2020; 9(8):1290. https://doi.org/10.3390/electronics9081290

Chicago/Turabian Style

Lee, Jeong-Yun, Gwang S. Kim, Goo-Han Ko, Kwang-Il Oh, Jae G. Park, and Donghyun Baek. 2020. "Low Phase Noise and Wide-Range Class-C VCO Using Auto-Adaptive Bias Technique" Electronics 9, no. 8: 1290. https://doi.org/10.3390/electronics9081290

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