Title :
A compact automatic gain control loop for GNSS RF receiver
Author :
Zhou, Mingxing ; Fan, Chaojie ; Chen, Dongpo ; Mao, Cui
Author_Institution :
Center for Analog/RF Integrated Circuits (CARFIC), Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
A compact automatic gain control (AGC) loop for GNSS RF receiver is presented in this paper. The proposed AGC loop circuit achieves higher integration and lower power by eliminating the bulky off-chip capacitor and charge pump circuit, which are widely used in traditional AGC. The proposed AGC consists of a programmable gain amplifier (PGA), a 2-bit flash analog to digital converter (ADC), and a novel AGC unit. The proposed AGC loop circuit is implemented in a 0.18μm CMOS process, and occupies a die area of 0.275mm2. Simulation results show that the proposed AGC loop has a 29.5dB control range and a settling time of less than 0.25ms.
Keywords :
CMOS integrated circuits; analogue-digital conversion; charge pump circuits; gain control; radio receivers; satellite navigation; ADC; AGC loop circuit; CMOS process; GNSS RF receiver; PGA; analog to digital converter; bulky off-chip capacitor; charge pump circuit; compact automatic gain control loop; programmable gain amplifier; size 0.18 micron; Capacitors; Electronics packaging; Gain control; Global Navigation Satellite Systems; Radiation detectors; Radio frequency; Receivers;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2010 10th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-5797-7
DOI :
10.1109/ICSICT.2010.5667754
