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In this paper, a silicon-integrated differential-type two-stage recursive active filter based on a cellular approach is presented. This circuit is independently tunable in terms of power transmission gain, center frequency and bandwidth. The chip surface is less than 1.4 mm2. Measurements demonstrate a 1.9-2.4 GHz center-frequency tuning range with a typical gain of 15 dB and a 3-dB bandwidth of 60...
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