Title :
A merged gain-variable RF front-end design for a 2GHz WCDMA DCR application II
Author :
Koh, Kwang-Jin ; Park, Mun-Yang ; Yu, Hyun-Kyu
Abstract :
A merged LNA and sub-harmonic mixer is proposed for a 2GHz WCDMA DCR application. It adopts differential variable gain LNA to increase system dynamic range and 2nd order linearity. To remove DC offset, which can be introduced by self-mixing problem, the proposed architecture uses sub-harmonic mixing technique. To increase RF to LO isolation, we use 0.18μm triple-well CMOS process. The system shows 28dB and 14dB conversion gain at high gain mode and low gain mode respectively. In each case, the IIP2s are 4.5dBm and 12dBm, and IIP3s are -5dBm and 3.6dBm. The overall power consumption is less than 18mW. The supply voltage is 1.8V and over-all chip size is 2.3mm×1.2mm.
Keywords :
CMOS analogue integrated circuits; UHF amplifiers; UHF integrated circuits; code division multiple access; low-power electronics; 0.18 micron; 1.8 V; 14 dB; 2 GHz; 28 dB; DC offset; WCDMA DCR application; conversion gain; differential variable gain LNA; gain mode; merged LNA; merged gain-variable RF front-end design; overall power consumption; sub-harmonic mixer; sub-harmonic mixing technique; system dynamic range; triple-well CMOS process; Application specific integrated circuits; CMOS process; Dynamic range; Energy consumption; Gain; Linearity; Multiaccess communication; Noise figure; Radio frequency; Voltage;
Conference_Titel :
Circuits and Systems, 2002. MWSCAS-2002. The 2002 45th Midwest Symposium on
Print_ISBN :
0-7803-7523-8
DOI :
10.1109/MWSCAS.2002.1186895
