In this paper, second-order RF Q-enhanced filters with center frequencies of 2.4/4.7 GHz are presented. The prototype designs are implemented in a 0.18 μm standard CMOS process, The filters achieve a SFDR of 43/35 dB at a Q of 250, while requiring only 0.3/1.2 mW when powered by a 1.5V supply voltage. This is the first reported CMOS Q-enhanced filter capable of operating in the 5 GHz band.

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Conference Proceedings of the 2003 IEEE International Symposium on Circuits and Systems
Citation
Ahmed, H., DeVries, C., & Mason, R. (2003). RF, Q-enhanced bandpass filters in standard 0.18 μm CMOS with direct digital tuning. Presented at the Proceedings of the 2003 IEEE International Symposium on Circuits and Systems.