An analog controlled Variable Gain LNA (VGLNA) with tunable operating frequency bands is reported. The analog control circuit for the continuous gain variation is proposed as a low voltage version. The fabricated LNA based on 0.18µm CMOS shows a gain range of 15 ∼ -12dB (27dB gain control), a noise figure (NF) of 2dB, and an IIP3 of -10dBm while 5mA is drawn from a 1.2V supply over the frequency range of 470∼880MHz.
