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A 750 MHz to 3 GHz tunable narrowband low-noise amplifier

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2 Author(s)
Andersson, S. ; Dept. of E.E., Linkoping Univ., Sweden ; Svensson, C.

An active recursive filter approach is proposed for the implementation of an inductorless, tunable LNA in CMOS. A test circuit was designed and manufactured in a 0.18 μm CMOS technology. The feasibility of this type of LNA was demonstrated in both simulations and measurements and reasonably good performance was obtained. The measurements show a center frequency tuning range from 0.75-3 GHz and a minimum noise figure of 4.8 dB. Gain and Q value are also tunable in a wide range. Measured IIP-3 and 1-dB compression point is -24 dBm and -29.5 dBm respectively, measured at the center frequency 1.7 GHz and with 21 dB gain.

Published in:

NORCHIP Conference, 2005. 23rd

Date of Conference:

21-22 Nov. 2005