Title :
Adaptive analog IF signal processor for a wide-band CMOS wireless receiver
Author :
Behbahani, Farbod ; Karimi-Sanjaani, Ali ; Tan, Wee-Guan ; Roithmeier, Andreas ; Leete, John C. ; Hoshino, Koichi ; Abidi, Asad A.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
8/1/2001 12:00:00 AM
Abstract :
An IF strip for a wireless receiver supports a variable baud rate by changing analog filter bandwidth. Sliding and step adaptive dynamic range are both used at IF to dissipate only the necessary power at prevailing channel conditions. A combination of VGA and PGA is developed for 64-QAM. The total signal processor draws an average of 16 mA from 3.3 V and a peak of 73 mA. The differential input noise is as low as 3.9 nV/√Hz, while maximum IIP3 is +22 dBm with respect to 100 ohms
Keywords :
CMOS analogue integrated circuits; active filters; adaptive signal processing; analogue processing circuits; band-pass filters; differential amplifiers; feedback amplifiers; intermediate-frequency amplifiers; mobile radio; quadrature amplitude modulation; radio receivers; wideband amplifiers; 16 mA; 3.3 V; IF strip; QAM; active filter; adaptive analog IF signal processor; analog filter bandwidth; bandpass filter; degenerated differential pair; local feedback loop gain; low differential input noise; programmable gain amplifier; sliding adaptive dynamic range; step adaptive dynamic range; variable baud rate; variable gain amplifier; wideband CMOS wireless receiver; Band pass filters; Bandwidth; CMOS process; Circuits; Dynamic range; Energy consumption; Finite impulse response filter; Signal processing; Strips; Wideband;
Journal_Title :
Solid-State Circuits, IEEE Journal of
