A CMOS channel-select tunable filter for 3G wireless receivers. Alzaher, H., Tasadduq, N., & Ismail, M. In Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems, volume 2, 2003.
abstract   bibtex   
A new approach for designing digitally programmable CMOS integrated baseband filters is presented. It utilizes digitally controlled current followers and R-2R ladders to provide precise frequency characteristics that can he tuned over a wide range without components spreading. A 6- order Buttemoth lowpass filter is designed for implementing the baseband channel select filter in an integrated multi-standard CMOS wireless receiver. Experimental results obtained from a 0.6pm chip show a programmable frequency response accommodating PDC, IS-54, GSM, IS-95 and WCDMA wireless standards. The proposed filter design achieves dynamic ranges of 90dB for PDC (IS-54), 89dB for GSM, 84dB for IS-95 and 80dB for WCDMA. © 2033 IEEE.
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 title = {A CMOS channel-select tunable filter for 3G wireless receivers},
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 year = {2003},
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 abstract = {A new approach for designing digitally programmable CMOS integrated baseband filters is presented. It utilizes digitally controlled current followers and R-2R ladders to provide precise frequency characteristics that can he tuned over a wide range without components spreading. A 6- order Buttemoth lowpass filter is designed for implementing the baseband channel select filter in an integrated multi-standard CMOS wireless receiver. Experimental results obtained from a 0.6pm chip show a programmable frequency response accommodating PDC, IS-54, GSM, IS-95 and WCDMA wireless standards. The proposed filter design achieves dynamic ranges of 90dB for PDC (IS-54), 89dB for GSM, 84dB for IS-95 and 80dB for WCDMA. © 2033 IEEE.},
 bibtype = {inProceedings},
 author = {Alzaher, H. and Tasadduq, N. and Ismail, M.},
 booktitle = {Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems}
}

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