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A Q-enhanced Transformer Coupling Dynamic Dual-Mode 5GHz Bandpass NB / Interference Rejection UWB Filter

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2 Author(s)
B. Pham ; Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5A9, Canada ; A. Dinh

This paper presents a fully integrated dual mode Q-enhanced bandpass/notch filter front-end designed for narrowband and UWB receivers. Using a simple logic state to switch its function, the filter can provide bandpass filtering for channel selection in the NB mode or NB interference rejection in the UWB mode. A Q-enhanced circuit coupled through a transformer is used to realize the modes. Using 1.8 V supply, the filter consumes 22 mW of power and provides a 32 dB interference rejection in the UWB mode and a gain of 24 dB in the NB mode. The design occupies a die area of 1 mm2 using the mainstream 0.18 mum CMOS process.

Published in:

2007 IEEE Custom Integrated Circuits Conference

Date of Conference:

16-19 Sept. 2007