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A 3.8Ghz channel-select filter using 0.18μm CMOS

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2 Author(s)
Jiandong Ge ; Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask., Canada ; Anh Dinh

A high gain bandpass filter was designed as a channel-select filter for applications around 3.8GHz. Three stages of 2nd order were cascaded to have a high image rejection filter with an adjustable bandwidth. An experimental filter designed using standard 0.18μm CMOS occupies an area of 0.9×0.9mm2. This high performance filter provides a selected center frequency ranging from 3.6GHz to 3.8GHz, an image-rejection of 50dB and a tunable Q from 25 to 50 for bandwidth adjustment. The filter achieves a 15dB gain from a 1.8V supply.

Published in:

SOC Conference, 2004. Proceedings. IEEE International

Date of Conference:

12-15 Sept. 2004