Low Power Low Phase Noise LC Quadrature VCO Topology

Ji-Hoon KIM  Hyung-Joun YOO  

IEICE TRANSACTIONS on Electronics   Vol.E89-C    No.3    pp.440-442
Publication Date: 2006/03/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e89-c.3.440
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electronic Circuits
LC QVCO,  low power,  low phase noise,  

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A simple low power low phase noise LC QVCO (Quadrature Voltage Controlled Oscillator) topology is proposed. The topology minimizes phase noise by eliminating the contributions from the tail current source and coupling transistors. With no more than 3.36 mW power consumption from a 1.2 V power supply, the VCO achieves -124 dBc/Hz phase noise performance at 1 MHz offset from the 2.85 GHz carrier frequency.