Title :
A novel LC T-structure filter integrated with CMOS mixer for image rejection
Author :
Phan, Anh-Tuan ; Kim, Chang-Wan ; Kang, Min-Suk ; Shim, Yun-A ; Lee, Sang-Gug ; Su, Chun-Deok
Author_Institution :
RFME Lab., Inf. & Commun. Univ., Daejeon, South Korea
Abstract :
A new image rejection mixer in heterodyne architecture for 2 GHz band applications based on 0.18 μm CMOS technology is presented. The designed mixer uses a LC T-structure filter to suppress the image signal, leading to improvements in the noise figure (NF) and conversion gain. An image rejection ratio of 25-52 dB is obtained in a 150 MHz of bandwidth from 1.95 to 2.1 GHz with IF varying from 200 to 350 MHz. The simulation results show the single-side band (SSB) NF of 3.2 dB improved by 2.4 dB and the conversion gain of 13.4 dB improved by more than 1.4 dB. The circuit operates at a supply voltage of 1.8 V and dissipates 12 mW.
Keywords :
CMOS analogue integrated circuits; UHF mixers; band-pass filters; heterodyne detection; integrated circuit design; radio receivers; 0.18 micron; 1.8 V; 1.95 to 2.1 GHz; 12 mW; 13.4 dB; 150 MHz; 200 to 350 MHz; 3.2 dB; CMOS mixer; LC T-structure filter; band pass filter; conversion gain; heterodyne architecture; image rejection mixer; image signal suppression; noise figure; single-side band NF; wireless receivers; Amplitude modulation; Bandwidth; CMOS technology; Circuit simulation; Filters; Gain; Image converters; Noise figure; Noise measurement; Signal design;
Conference_Titel :
Intelligent Signal Processing and Communication Systems, 2004. ISPACS 2004. Proceedings of 2004 International Symposium on
Print_ISBN :
0-7803-8639-6
DOI :
10.1109/ISPACS.2004.1439161
