Title :
A self-calibration technique for mismatches in image-reject receivers
Author :
Elmala, Mostafa A I ; Embabi, Sherif H K
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
This paper presents a modified image-reject Weaver architecture. The design automatically calibrates for phase and gain mismatches that limit the performance of image-reject receivers. On-line or off-line calibrations are possible without using any calibrating tone. An experimental CMOS prototype RF front-end operating at 1.8 GHz achieves an image rejection ratio of 59 dB using on-line calibration. The design was fabricated in a 0.35 μm CMOS process and dissipates 160 mW from a 3 V supply during on-line calibration
Keywords :
CMOS integrated circuits; UHF integrated circuits; calibration; integrated circuit design; integrated circuit measurement; radio receivers; 0.35 micron; 1.8 GHz; 160 mW; 3 V; CMOS process; CMOS prototype RF front-end; calibrating tone; gain mismatches; image rejection ratio; image-reject receivers; modified image-reject Weaver architecture; off-line calibrations; on-line calibration; on-line calibrations; phase mismatches; power dissipation; self-calibration technique; CMOS process; Calibration; Instruments; Low pass filters; Performance gain; Prototypes; RF signals; Radio frequency; Signal generators; Time division multiple access;
Conference_Titel :
Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-7250-6
DOI :
10.1109/CICC.2002.1012807
