Title :
A fully differential low noise amplifier with real-time channel hopping for ultra-wideband wireless applications
Author :
Tang, Siu-Kei ; Pun, Kong-Pang ; Choy, Chiu-Sing ; Chan, Cheong-Fat
Author_Institution :
Dept. of Electron. Eng., Chinese Univ. of Hong Kong
Abstract :
In this paper, a CMOS low noise amplifier (LNA) employing the switched-capacitors is proposed to perform multi-band tuning for an MB-OFDM ultra-wideband (UWB) hopping system. By using the fully differential topology, the switching noise generated during each frequency transition interval is greatly suppressed. The proposed UWB LNA is implemented in a standard 0.18-mum CMOS process. The simulation results show that it is capable of performing the fast switching with a settling time of less than 3 ns. Furthermore, the switching noise voltage at the output is rapidly reduced to less than 1 muV within 5 ns. The designed circuit is optimized in each center frequency, achieving the maximum power gain of 16.2 dB and the minimum noise figure of 2.63 dB
Keywords :
CMOS integrated circuits; OFDM modulation; differential amplifiers; integrated circuit design; low noise amplifiers; switched capacitor networks; ultra wideband technology; wideband amplifiers; 0.18 micron; 16.2 dB; 2.63 dB; 5 ns; CMOS low noise amplifier; CMOS process; MB-OFDM ultra-wideband hopping system; differential amplifier; frequency transition interval; multiband tuning; real-time channel hopping; switched-capacitors; switching noise; ultra-wideband wireless applications; CMOS process; Circuit simulation; Differential amplifiers; Frequency; Low-noise amplifiers; Noise generators; Noise reduction; Topology; Tuning; Ultra wideband technology;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693631
