Analog Integrated Circuits and Signal Processing

, Volume 46, Issue 2, pp 169–171 | Cite as

Universal Current-Mode Active-C Filter Employing Minimum Number of Passive Elements

  • Erkan Yuce
  • Shahram MinaeiEmail author
  • Oguzhan Cicekoglu


A universal current-mode active-C filter simultaneously realizing low-pass, band-pass and high-pass responses is proposed. The filter can also realize notch and all-pass responses with interconnection of relevant output currents. The presented filter employs four second-generation current controlled conveyors (CCCIIs) as active elements and only two capacitors as passive elements. The proposed active-C filter can be tuned electronically, and has low element sensitivities.

Key Word

current controlled conveyor current-mode universal filter 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    G. Ferri and N. C. Guerrini, Low-Voltage Low-Power CMOS Current Conveyors, London Kluwer Academic Publishers, 2003Google Scholar
  2. 2.
    S. Özoğuz and C. Acar, “Universal current-mode filter with reduced number of active and passive components”. Electronics Letters, vol. 33, pp. 948–949, 1997.Google Scholar
  3. 3.
    C.L. Hou and J.S. Wu, “Universal cascadable current-mode biquad using only four CCIIs”. International Journal of Electronics, vol. 82, pp. 125–129, 1997.Google Scholar
  4. 4.
    C.M. Chang, “Novel universal current-mode filter with single input and three outputs using only five current conveyors.” Electronics Letters, vol. 29, pp. 2005–2007, 1993.Google Scholar
  5. 5.
    C.M. Chang, “Universal active current filter with single input and three outputs using CCIIs.” Electronics Letters, vol. 29, pp. 1932–1933, 1993.Google Scholar
  6. 6.
    H.Y. Wang and C.T. Lee, “Versatile insensitive current-mode universal biquad implementation using current conveyors”. IEEE Transactions on Circuits and Systems-II: Analog and Digital Signal Processing, vol. 48, pp. 409–413, 2001.Google Scholar
  7. 7.
    E. Yuce, B. Metin, and O. Cicekoglu, “Current-mode biquadratic filters using single CCIII and minimum number of passive elements.” Frequenz vol. 58, pp. 225–228, 2004.Google Scholar
  8. 8.
    S. Minaei and S. Türköz, “Current-mode electronically tunable universal filter using only plus-type current controlled conveyors and grounded capacitors.” ETRI Journal, vol. 26, pp. 292–296, 2004.Google Scholar
  9. 9.
    A. Fabre, O. Saaid, F. Wiest, and C. Boucheron, “High frequency applications based on a new current controlled conveyor.” IEEE Transactions on Circuits and Systems-I: Fundamental Theory and Applications, vol. 43, pp. 82–91, 1996.Google Scholar
  10. 10.
    D.R. Frey, “Log-domain filtering: An approach to current-mode filtering.” IEE Proceedings-G, Circuits, Devices and Systems, vol. 140, pp. 406–416, 1993.Google Scholar

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Electrical and Electronic Engineering DepartmentBogazici UniversityBebek-IstanbulTurkey
  2. 2.Electronics and Communication Engineering DepartmentDogus UniversityIstanbulTurkey

Personalised recommendations