An Area-Efficient Multistage 3.0-to 8.5-GHz CMOS UWB LNA Using Tunable Active Inductors

作者：Reja Md Mahbub^*; Moez Kambiz; Filanovsky Igor

来源：IEEE Transactions on Circuits and Systems II-Express Briefs, 2010, 57(8): 587-591.

DOI：10.1109/TCSII.2010.2055990

• Active inductor (AI)
• CMOS
• low-noise amplifier (LNA)
• shunt peaking
• ultrawideband (UWB)

An area-efficient multistage 3.0- to 8.5-GHz ultrawideband low-noise amplifier (LNA) utilizing tunable active inductors (AIs) is presented. The AI includes a negative impedance circuit (NIC) consisting of a pair of cross-coupled NMOS transistors and is tuned to vary the gain and bandwidth (BW) of the amplifier. Fabricated in a 90-nm digital CMOS process, the proposed fully on-chip LNA occupies a core chip area of only 0.022 mm(2). The measurement results show a power gain S21 of 16.0 dB, a noise figure of 3.1-4.4 dB, and an input return loss S11 of less than -10.5 dB over the 3-dB BW of 3.0-8.5 GHz. Tuning the AIs allows one to increase the gain above 18.0 dB and to extend the BW over 9.4 GHz. The LNA consumes 16.0 mW from a power supply of 1.2 V.

• 出版日期2010-8