Title :
An offset cancellation CMOS VGA for GPS receiver
Author :
Li, Tianwang ; Jiang, Jinguang ; Ye, Bo
Author_Institution :
Dept. of Integrated Circuits & Commun. Software, Wuhan Univ., Wuhan, China
Abstract :
An offset cancellation CMOS variable gain amplifier (VGA) is presented in this paper. Four input terminals full differential operational transconductance amplifier is used for the proposed VGA. The input signal offset is suppressed by the AC coupling circuitry. Two-stage VGA is proposed for GPS receiver. The proposed design is fabricated in 0.18 ¿m CMOS process. The gain range of VGA is from 6 dB to 48 dB with 6 dB gain step, the total power consumption is 3.6 mW.
Keywords :
CMOS analogue integrated circuits; Global Positioning System; differential amplifiers; operational amplifiers; radio receivers; AC coupling circuitry; GPS receiver; Global Positioning System; differential operational transconductance amplifier; gain 6 dB to 48 dB; input signal offset; offset cancellation CMOS VGA; power 3.6 mW; size 0.18 mum; total power consumption; variable gain amplifier; Bandwidth; Coupling circuits; Dynamic range; Energy consumption; Filters; Gain; Global Positioning System; Linearity; Power engineering computing; Voltage; Global positioning system (GPS); offset; receiver; voltage gain amplifier;
Conference_Titel :
Integrated Circuits, ISIC '09. Proceedings of the 2009 12th International Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-9-8108-2468-6
