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A low-phase-noise and low-power CMOS colpitts VCO using Gm boosting and capacitance switching techniques
Author(s)
Date Issued
January 1, 2021
Type
Article
Abstract
This letter presents a low-power and low-phase-noise 5-GHz VCO fabricated in a standard CMOS 0.18-μm process. The low power dissipation was achieved by using the PMOS cross-coupled pair and Gm-boosting topology, and the low phase noise was obtained by adding two pairs of switched capacitor array. The VCO consumed a dc power of 2.92 mW with the supply voltage of 1 V. The measured phase noises were − 104.6 dBc/Hz and − 117.4 dBc/Hz at 1 MHz offset frequency with switched off and on capacitances, respectively, which demonstrated 12.8-dB improvement.
Citation
Microwave and Optical Technology Letters, 63(1), 46-50, 2021