Title :
SAW-less GNSS front-end amplifier with 80.4-dB GSM blocker suppression using CMOS directional coupler notch filter
Author :
Yongan Zheng ; Le Ye ; Long Chen ; Huailin Liao ; Ru Huang
Author_Institution :
Inst. of Microelectron., Peking Univ., Beijing, China
Abstract :
This paper presents a SAW-less GNSS front-end amplifier with GSM blocker suppression using CMOS directional coupler notch filter. The front-end amplifier is aimed at the GNSS receiver integrated in cellular phones. Based on our proposed CMOS stacked spiral-coupled (SSC) directional coupler working at the frequency of 900MHz as notch filter, the front end amplifier achieves a NF of 1.7dB and a 80.4-dB suppression of the GSM blocker while provides signal gain of 38.6-dB for the GPS L1-band signal.
Keywords :
CMOS integrated circuits; directional couplers; notch filters; satellite navigation; CMOS directional coupler notch filter; GSM blocker suppression; SAW-less GNSS; front-end amplifier; gain 38.6 dB; noise figure 1.7 dB; CMOS integrated circuits; Directional couplers; GSM; Global Navigation Satellite Systems; Global Positioning System; Receivers; Tuning;
Conference_Titel :
Circuits and Systems (ISCAS), 2013 IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-5760-9
DOI :
10.1109/ISCAS.2013.6571955
