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This paper presents a switchable single/double-band, low noise amplifier (LNA) for WLAN and WiMax systems. The LNA uses wideband bandpass filters and a capacitor of reduced high frequency signals at input matching networks. At the inter stage, using a series resonator increases gain at high frequency. To obtain a small chip size, this study used two center tapped inductors and a switch. This study...
A 2.5 V second order RF bandpass filter is presented. A new Q-enhancement structure stacked on a LNA is fabricated in a 65-nm CMOS process with a die area of 1.1 mm ?? 1.1 mm. The frequency range is adjustable in a 25% range from 1.7 GHz to 2.2 GHz while the Q is adjustable up to 50. Q and the center frequency are adjusted by binary weighted switchable capacitors. The filter draws 42 mA including...
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