A Compact Circuit Model of Five-Port Transformer Balun for CMOS RF Integrated Circuits

Shinil CHANG  Hyunchol SHIN  

IEICE TRANSACTIONS on Electronics   Vol.E91-C   No.10   pp.1709-1712
Publication Date: 2008/10/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e91-c.10.1709
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
balun,  transformer,  circuit model,  RF integrated circuits,  

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A compact circuit model for five-port on-chip transformer balun is presented. Compared to the conventional model, the proposed model is simpler without any accuracy degradation and ensures faster convergence time, which in turn enables flexible RF circuit design optimization. The validity of the proposed model is confirmed through extensive EM simulations and measurements.