Title :
A dual-band LNA with active balun for GNSS receivers
Author :
Wu, Jun ; Jiang, Peichen ; Chen, Dongpo ; Zhou, Jianjun
Author_Institution :
Center for Analog/RF Integrated Circuits (CARFIC), Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
This paper presents the design and implementation of a dual-band reconfigurable low noise amplifier (LNA) for multi-band GNSS receivers. The proposed LNA incorporates an active balanced-to-unbalanced (balun) conversion and a step gain control. The LNA also utilizes a constant gm biasing to maintain a constant LNA gain over process, voltage, temperature (PVT) variations. The operating frequency of the LNA can be configured at either 1.2GHz or 1.57GHz by off-chip matching network. The LNA is designed in a 0.18-μm CMOS process, occupying a die area of 0.65 × 0.55mm2, including ESD, power clamp and bonding pads. Post-simulation results show that the proposed dual-band LNA achieves a voltage gain of 25dB and 22dB, a noise figure (NF) of 2.1dB and 2.3dB, at 1.2GHz and 1.57GHz respectively. The LNA draws 3.5mA current from a 1.8V supply.
Keywords :
CMOS analogue integrated circuits; baluns; low noise amplifiers; radio receivers; satellite navigation; CMOS process; active balun; current 3.5 mA; dual-band LNA; frequency 1.2 GHz; frequency 1.57 GHz; gain 22 dB; gain 25 dB; low noise amplifier; multi-band GNSS receivers; noise figure 2.1 dB; noise figure 2.3 dB; size 0.18 mum; voltage 1.8 V; Dual band; Gain; Global Navigation Satellite Systems; Global Positioning System; Impedance matching; Noise; Noise measurement;
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.2010.5667286
