Alessio Vallese, A. Bevilacqua, C. Sandner, M. Tiebout, A. Gerosa, A. Neviani
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An analog front-end with integrated notch filter for 3–5 GHz UWB receivers in 0.13 μm CMOS
A 3-5 GHz UWB receiver front-end employs a notch filter to deal with out-of-band blockers coming from Wi- Fi systems. The front-end draws a total of 20 mA from a 1.5 V supply (excluding the notch filter) and features a 3-step variable gain, with a maximum gain of 25 dB. The notch Alter provides as much as 36 dB of attenuation with a power consumption penalty of less than 20% and improves the linearity of the circuit by at least 6 dB. An algorithm for the automatic tuning and calibration of the filter is also demonstrated.
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