Title :
An integrated SAW-less narrowband RF front-end
Author :
Abouzied, Mohamed ; Osman, Hattem ; Mohieldin, Ahmed N. ; Emira, Ahmed ; Soliman, Ahmed
Author_Institution :
Dept. of Electr. Eng., Cairo Univ., Giza, Egypt
Abstract :
In this paper an integrated SAW-less narrowband RF front-end for direct conversion wireless receivers is presented. The analysis of the feedback system shows a shift of the center frequency fRX for the overall RF bandpass filter from its nominal value fLO. The proposed architecture incorporates a notch filter at 2fLO to insure that there is no shift in fRX. The design has been implemented in 65nm CMOS process. It consumes 44mA from a single 1.2V supply. Simulation results show a rejection of more than 15dB in a bandwidth of +/-500MHz around 2GHz due to the additional feedback loop. The theoretical and simulation results are in close agreement.
Keywords :
CMOS integrated circuits; band-pass filters; closed loop systems; radiofrequency filters; surface acoustic waves; RF bandpass filter; direct conversion wireless receivers; integrated SAW-less narrowband RF front-end; Band pass filters; Bandwidth; Baseband; Filtering; Local oscillators; Narrowband; Negative feedback; Radio frequency; Stability; Surface acoustic waves;
Conference_Titel :
Circuits and Systems (MWSCAS), 2010 53rd IEEE International Midwest Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-7771-5
DOI :
10.1109/MWSCAS.2010.5548913
