Title :
A Mode-I/Mode-III UWB LNA with programmable gain and 20 dB WLAN blocker rejection in 130nm CMOS
Author :
Gupta, Subhanshu ; Gangopadhyay, Daibashish ; Allstot, David J.
Author_Institution :
Dept. of Electr. Eng., Univ. of Washington, Seattle, WA, USA
fDate :
May 30 2010-June 2 2010
Abstract :
Wireless local area network (WLAN) transmissions in the 5-6 GHz band pose severe desensitization problems for UWB receivers. This paper describes a concurrent Mode-I (3.17-4.75 GHz) and Mode-III (6.34-7.92 GHz) UWB low-noise amplifier (LNA) employing a wideband filter with a tunable notch that attenuates WLAN blockers. Specifically, the notch attenuation and gain are tunable over a wide range. The gain is enhanced using wideband feedback and is programmable from 9-14.5 dB. Simultaneously, blocker attenuation of 10-20 dB over the WLAN frequency band is achieved. Implemented in a 0.13-μm CMOS process and operated with 4.8 mA bias current, the LNA achieves a NF of 4.3-5.1 dB and a minimum IIP3 of -1.1 dBm.
Keywords :
CMOS integrated circuits; radio receivers; ultra wideband communication; wireless LAN; CMOS; CMOS process; UWB LNA; UWB receivers; WLAN; blocker rejection; current 4.8 mA; desensitization problems; frequency 3.17 GHz to 4.75 GHz; frequency 5 GHz to 6 GHz; frequency 6.34 GHz to 7.92 GHz; gain 20 dB; programmable gain; size 130 nm; wideband filter; wireless local area network; Attenuation; CMOS process; Feedback; Filters; Frequency; Gain; Low-noise amplifiers; Noise measurement; Wideband; Wireless LAN;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537339
