A 2–11 GHz reconfigurable multi-mode LNA in 0.13µm CMOS

摘要

This paper presents a reconfigurable multimode LNA capable of single band, concurrent dual-band, and ultra-wideband operation. The multi-mode operation is realized by incorporating a switched multi-tap transformer into the input matching network of an inductively degenerated common source amplifier. The proposed LNA achieves single band matching at 2.8 GHz, 3.3 GHz, and 4.6 GHz; concurrent dual-band matching at 2.05 GHz and 5.65 GHz; and ultra-wideband matching from 4.3 GHz to 10.8 GHz. The power dissipation is 6.4 mW from a 1.2 V supply. The chip was fabricated in 0.13µm CMOS and occupies an area of 1.04 × 0.7 mm².