User menu

Accès à distance ? S'identifier sur le proxy UCLouvain

New high-Q discrete-time LC bandpass filter design with center frequency broadband tuning

Primary tabs

El Oualkadi, A. Paillot, JM Allam, R

Discrete-time switched-capacitor filters have been in wide-spread used for a few years, for the realization of stable, accurate and high quality filters. This paper describes the design of a new 8-path pseudo switched-capacitor LC bandpass filter and its command circuit made up by a ring voltage controlled oscillator (VCO) with 'XOR' gates. The proposed architecture presents the possibility of tuning over a frequency broadband allowing to sweep different channels with a high quality factor. This circuit is intended to replace the surface acoustic wave (SAW) filters in broadband wireless applications. Experimental results carried out on a prototype show quality factors up to 200, and a tunable center frequency range of 300 MHz [250-550 MHz].

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2006
Language Anglais
Journal information "Analog Integrated Circuits and Signal Processing" - Vol. 48, no. 2, p. 151-157 (2006)
Peer reviewed yes
Publisher Springer (Dordrecht)
issn 0925-1030
e-issn 1573-1979
Publication status Publié
Affiliation UCL
Keywords CMOS analog circuits ; high-Q ; bandpass tunable filters ; switched-capacitor ; broadband
Links
  1. P.J. Chang, A. Rofougaran, and A.A. Abidi, “A CMOS channel-select filter for a direct-conversion wireless receiver.” IEEE J. Solid-State Circuits, vol. 32, no. 5, pp. 722–729, 1997.
  2. A. Yoshizawa and Y.P. Tsividis, “Anti-blocker design techniques for MOSFET-C filters for direct conversion receivers.” IEEE J. Solid-State Circuits, vol. 37, no. 3, pp. 357–364, 2002.
  3. C. Toumazou, D.G. Haigh, S.J. Harrold, S.J. Steptoe, J.I. Sewell, and R. Bayruns, “400 MHz switching rate GaAs switched capacitor filter.” IEE Electronics Letters, vol. 26, pp. 460–461, 1990.
  4. J.M. Paillot, A. El Oualkadi, H. Guegnaud, and R. Allam, “Switched capacitor bandpass filter tuned by ring VCO in CMOS 0.35 μm.” IEEE RFIC-IMS Symposium, Philadelphia, pp. 119–122, 2003.
  5. D.Von Grûnigen, R.P. Sigg, J. Schmid, G.S. Moschytz, and H. Melchior, “ An integrated CMOS switched-capacitor bandpass filter based on N-path and frequency-sampling principles.” IEEE J. Solid State Circuits, vol. SC-18, no. 26, pp. 753–761, 1983.
  6. U. Kleine, W. Brockherde, A. Fettweis, B.J. Hosticka, J. Pandel, and G. Zimmer, “An integrated six-path wave-SC filter.” IEEE J. of Solid State Circuits, vol. SC-20, no. 2, pp. 632–640, 1985.
  7. J.C. Nallatamby, M. Bridier, M. Prigent, and J. Obregon, “Switched capacitors and sampled circuit by harmonic balance and related techniques.” Electronics Letters, vol. 27, no. 25, pp. 2364–2367, 1991.
  8. H. Wupper, “A modified N-path filter suited for practical realization.” IEEE Trans. on Circuits and Systems, vol. 21, pp. 449–456, May 1974.
  9. T.H. Lee and A. Hajimiri, “Oscillator phase noise: A tutorial.” IEEE Journal of Solid-State Circuits, vol. 35, no 3, pp. 326–336, 2000.
  10. A. Hajimiri and T.H. Lee, Low Noise Oscillators, Kluver Academic Publishers, 2002.
Bibliographic reference El Oualkadi, A. ; Paillot, JM ; Allam, R. New high-Q discrete-time LC bandpass filter design with center frequency broadband tuning. In: Analog Integrated Circuits and Signal Processing, Vol. 48, no. 2, p. 151-157 (2006)
Permanent URL http://hdl.handle.net/2078.1/38428