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Transformer based multiple coupled LC tanks for on-chip VCO design and applications
Conference proceeding

Transformer based multiple coupled LC tanks for on-chip VCO design and applications

Kaixue Ma, Qiong Zou, Shouxian Mou, N. Mahalingam and Kiat Seng Yeo
2012 IEEE International Symposium on Radio-Frequency Integration Technology, pp.192-194
11/2012
DOI: https://doi.org/10.1109/RFIT.2012.6401657

Abstract

CMOS integrated circuits Dual LC-Tanks Low Phase Noise Low Power Metals Multiple Coupled LC Tanks Phase noise Q factor Transformer Tuning Varactors Voltage Controlled Oscillator Voltage-controlled oscillators
A transformer based multiple coupled LC tanks model for on-chip VCO design is introduced. The merits of adoption multiple coupled LC tanks can be Q factor enhancement for the equivalent LC tank of VCO, low power consumption, better amplitude swing and broad tuning range can be obtained. As an illustration case two low power Ku band VCOs using dual LC-tanks with/without feedback designed using a 0.18 μm BiCMOS process for low phase noise or wide tuning range are demonstrated.

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