An Analog Controlled Variable Gain LNA with Tunable Frequency Bands

Yuna SHIM  Sang-Gug LEE  

IEICE TRANSACTIONS on Electronics   Vol.E94-C   No.7   pp.1240-1242
Publication Date: 2011/07/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E94.C.1240
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electronic Circuits
analog control,  LNA,  low supply voltage,  wideband,  

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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 0.18 µm CMOS shows a gain range of 15-12 dB (27 dB gain control), a noise figure (NF) of 2 dB, and an IIP3 of -10 dBm while 5 mA is drawn from a 1.2 V supply over the frequency range of 470880 MHz.