Title :
A merged structure of LNA & sub-harmonic mixer for multi-band DCR applications
Author :
Kwang-Jin Koh ; Mun-Yang Park ; Yong-Sik Youn ; Scon-Ho Han ; Jang-Hong Choi ; Cheon-Soo Kim ; Sung-Do Kim ; Hyun-Kyu Yu
Author_Institution :
Integrated Circuit Res. Dept., Electron. & Telecommun. Res. Inst., South Korea
Abstract :
A merged structure of variable gain LNA and sub-harmonic mixer is designed for multi-band direct conversion receiver (DCR) applications with a 0.18 /spl mu/m CMOS process. The circuit uses inductive peaking loads to increase the 3dB-bandwidth and achieves 22.7/spl sim/32dB conversion gain, 2.8/spl sim/4.1dB DSB NF, -10.5/spl sim/4.1dBm IIP3 and 5/spl sim/17.3 dBm IIP2 from a 800 MHz to 2.4 GHz input range. The variable gain range is 11.5 dB at 2.1 GHz and typical LO to RF isolation is less than -50 dBm, and DC offset voltage is less than 10 mV. The overall power consumption is 17 mW with a 1.8 V supply voltage and the chip size is 2.3 mm/spl times/1.2 mm.
Keywords :
1/f noise; CMOS analogue integrated circuits; UHF amplifiers; UHF mixers; integrated circuit design; integrated circuit measurement; integrated circuit noise; radio receivers; 0.18 micron; 1.2 mm; 1.8 V; 1/f noise reduction; 10 mV; 17 mW; 2.1 GHz; 2.3 mm; 2.8 to 4.1 dB; 22.7 to 32 dB; 800 MHz to 2.4 GHz; CMOS variable gain low noise amplifiers; DC offset voltage; DSB NF; IIP2; IIP3; LNA bandwidth/conversion gain; LO/RF isolation; amplifier power consumption/supply voltage/chip size; inductive peaking loads; merged LNA/sub-harmonic mixer structures; multi-band DCR applications; multi-band direct conversion receivers; variable gain range; Application specific integrated circuits; CMOS integrated circuits; Circuit noise; Gain; Noise measurement; Parasitic capacitance; Radio frequency; Switches; Transceivers; Voltage;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210925
