A Dual-Band Switchable 5-GHz CMOS Low Noise Amplifier for Wireless Multimedia Applications

Wen-Shen WUEN  Kuei-Ann WEN  

IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.6   pp.1056-1061
Publication Date: 2003/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Devices and Circuits for Next Generation Multi-Media Communication Systems)
CMOS LNA,  dual-band,  wireless LAN,  

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The paper presents a dual-band switchable low noise amplifier implemented in 0.25-µm CMOS technology for 5-GHz wireless multimedia applications. The high-speed wireless multimedia applications call for broadband design techniques for RF circuits. Instead of using conventional broadband techniques not well suitable for CMOS implementation, a dual-band switchable load is proposed for broadband LNA design. The dual-band switchable load enables the LNA operate at the lower or the upper band at 5-GHz band by a 1-bit control signal. The LNA exhibits over 17 dB power gain, 3.5 dB noise figure and input 1-dB compression point -23 dBm in both frequency bands. It draws 9.5 mA from 2.5 V supply. The power gain remains larger than 16 dB as temperature varies from -5 to 65.