Title :
Dual-band high-linearity variable-gain low-noise amplifiers for wireless applications
Author_Institution :
Philips Semicond., Sunnyvale, CA, USA
Abstract :
A typical dual-band RF receiver front-end architecture is shown. The low-noise amplifiers (LNA) should have low noise figures to increase sensitivity of the receivers, and high linearity to prevent interference from undesired adjacent-channel signals. To increase the dynamic range of the receivers and to reduce linearity required of the downconversion mixers, the LNAs are required to provide variable gain. When the RF input power is large, the gain of the LNA should be reduced.
Keywords :
automatic gain control; integrated circuit noise; mobile radio; radio receivers; radiofrequency amplifiers; RF input power; downconversion mixers; dual-band RF receiver; dual-band variable-gain amplifiers; dynamic range; linearity; low-noise amplifiers; noise figures; receiver front-end architecture; sensitivity; undesired adjacent-channel signals; variable gain; wireless applications; Circuit noise; Degradation; Dual band; Impedance; Low-noise amplifiers; Noise figure; Radio frequency; Resistors; Signal to noise ratio; Transconductance;
Conference_Titel :
Solid-State Circuits Conference, 1999. Digest of Technical Papers. ISSCC. 1999 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-5126-6
DOI :
10.1109/ISSCC.1999.759203
