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A 0.13-mu m CMOS fourth-order notch filter for the rejection of the 5-6 GHz interference in UWB front-ends is reported. The filter is integrated into an analog front-end for Mode #1 UWB. A thorough analysis based on a simplified model of the filter is carried out. An algorithm for the automatic tuning and calibration of the filter is also discussed and demonstrated. Two versions of the circuit are...
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...
A 0.13mum CM0S LNA for 3-to-5GHz UWB receivers embedding an integrated balun is reported. The LNA includes an integrated notch filter to mitigate the interference of WLAN blockers both in the UNII and ISM bands. Measured performance includes: voltage gain of 19.4dB, S11 < -10dB over the entire band, P1dB > -9.4dBm, and maximum notch filter attenuation of 44dB. The LNA and the notch filter consume...
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