Title :
A circuit technique improving the image rejection of RF front-ends
Author :
Levantino, S. ; Wang, X. ; Andreani, P. ; Samori, C. ; Lacaita, A.L.
Author_Institution :
DEI, Politecnico di Milano, Milan, Italy
Abstract :
This work presents a technique to reduce the phase errors of quadrature signals. The proposed concept is demonstrated on a 2.4-GHz single-sideband up-converter in a 0.35-μm BiCMOS process. The quadrature LO signals are obtained on-chip by means of two coupled oscillators, achieving a figure-of-merit of 186 dB. The image-rejection ratio improves by 7 to 11dB across the 28% LO tuning range with respect to a conventional design. The whole circuit dissipates 47 mW.
Keywords :
BiCMOS integrated circuits; integrated circuit design; radiofrequency integrated circuits; 0.35 micron; 0.35-μm BiCMOS process; 2.4 GHz; 2.4-GHz single-sideband up-converter; 47 mW; RF front-ends; circuit technique; coupled oscillators; image rejection; phase errors; quadrature LO signals; quadrature signals; BiCMOS integrated circuits; Energy consumption; Error correction; Frequency conversion; Local oscillators; Mixers; Radio frequency; Signal generators; Tail; Tuning;
Conference_Titel :
VLSI Circuits, 2004. Digest of Technical Papers. 2004 Symposium on
Print_ISBN :
0-7803-8287-0
DOI :
10.1109/VLSIC.2004.1346618
