A low power low phase noise dual-band multiphase VCO
Vamshi, M. Krishna
Do, Manh Anh
Boon, Chirn Chye
Yeo, Kiat Seng
Date of Issue2012
School of Electrical and Electronic Engineering
This paper presents a low-power low-phase noise multiphase VCO that operates in 2.5 GHz and 5.0 GHz frequency bands. The dual-band multiphase VCO uses the frequency doubling method to generate the higher band signals from the lower band signals, and it shows excellent phase noise performance compared to other dual-band multiphase VCOs presented in literature. The VCO has been implemented in 0.18 μm CMOS technology, and its frequency is tunable from 2.23 GHz to 2.68 GHz and from 4.46 GHz to 5.36 GHz. The measured phase difference between the I/Q signals is 90.0°/88.9° for the two frequency bands respectively. The phase noise figure-of-merits (FOMs) for the two frequency bands are −189.4 dB and −185.1 dB.
DRNTU::Engineering::Electrical and electronic engineering
© 2012 Elsevier Ltd.