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Lumped Modeling of Differentially Driven Symmetric Inductors for RF IC Design

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5 Author(s)
Ragonese, E. ; Facolta di Ingegneria, Univ. di Catania ; Scuderi, A. ; Biondi, T. ; Italia, A.
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This paper presents a lumped scalable model of integrated inductors for RF IC design. The model is validated up to 20 GHz by comparison with on-wafer measurements of both single-ended and differentially driven spirals covering 0.2- to 8.3-nH inductance values. Average errors on inductance, self-resonance frequency and quality factor are 2%, 5%, and 7%, respectively. High accuracy, full geometrical scalability and compactness promote the proposed model as a reliable time-saving design tool. As an example of model exploitation, an image-reject down-converter for 5-GHz wireless local area networks is presented. In this circuit differentially driven symmetric inductors are adopted to implement monolithic filters, which provide an image-rejection ratio as high as 56 dB

Published in:

Bipolar/BiCMOS Circuits and Technology Meeting, 2006

Date of Conference:

8-10 Oct. 2006