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Design methodology for the optimization of transformer-loaded RF circuits

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4 Author(s)
Carrara, F. ; Dipt. di Ingegneria Elettrica, Elettronica e dei Sistemi, Univ. di Catania, Italy ; Italia, A. ; Ragonese, E. ; Palmisano, G.

In this paper, a design methodology for the optimization of transformer-loaded RF circuits is presented. The optimization procedure is based on a novel figure of merit for the integrated transformer (namely the transformer characteristic resistance), which was introduced to quantify its performance when operated as a tuned load. Using the proposed approach, a highly linear up-converter for 5-GHz wireless LAN applications was implemented in a 45-GHz-fT SiGe HBT technology. The circuit achieved an output 1-dB compression point of 4.5 dBm and a power gain of 18 dB, while drawing only 34 mA from a 3-V power supply.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:53 ,  Issue: 4 )