Title :
Calibration of phase and gain mismatches in Weaver image-reject receiver
Author :
Elmala, Mostafa A I ; Embabi, Sherif H K
Author_Institution :
Coll. Station, Texas A&M Univ., College Station, TX, USA
Abstract :
A modified image-reject Weaver architecture is presented. 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, and 95 mW during normal receiving. The die area is 4 mm2.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; calibration; radio receivers; 0.35 micron; 1.8 GHz; 160 mW; 3 V; 95 mW; CMOS RF circuits; CMOS prototype RF front-end; Weaver image-reject receiver; calibrating tone; calibration; gain mismatch; image rejection ratio; image-reject receivers; phase mismatch; supply voltage; CMOS process; CMOS technology; Calibration; Circuits; Filters; Helium; Performance gain; Prototypes; Radio frequency; Signal generators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.821779
