Improved high dynamic range switched gain low-noise amplifier for wide-band CDMA applications

W-CDMA system require switched gain Low Noise Amplifier (LNA) with wide input dynamic range ICP1 in top of the receiver Front-End. This paper reports the design of an integrated switched gain LNA providing 1.65dB NF at 2140MHz with wide input ICP1=-10dBm in the high gain mode for 15.6 mW power supply. In the low gain mode operation, -11dB power loss is achieve while reducing by two the power consumption. This LNA use the BiCMOS6G SiGe process featuring 0.35µm RF BJT f
T
>40 GHz and 0.35µm MOS channel length. This process also offer on-chip octogonal inductor with quality factor around 10 at 2Ghz and metal-metal 1fF/µm
²
capacitor.