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A circuit technique improving the image rejection of RF front-ends

  • Salvatore Levantino
  • Xiaoyan Wang
  • Pietro Andreani
  • Carlo Samori
  • Andrea Lacaita
Publiceringsår: 2004
Språk: Engelska
Sidor: 368-371
Publikation/Tidskrift/Serie: 2004 Symposium on VLSI Circuits, 2004. Digest of Technical Papers.
Dokumenttyp: Konferensbidrag


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-/spl mu/m 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.


  • Electrical Engineering, Electronic Engineering, Information Engineering


  • ISBN: 0-7803-8287-0

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