Skip to main content
SpringerLink
Log in

Realization of Tunable Pole-Q Current-Mode OTA-C Universal Filter

  • Published:
Circuits, Systems and Signal Processing Aims and scope Submit manuscript

Abstract

A realization of a current-mode operational transconductance amplifier-capacitor (OTA-C) universal filter with tunable pole-Q is proposed. A biquadratic band-reject function is used as the initial synthesis function based on three integrator blocks. Consequently, the proposed filter uses a total of three multiple-output OTAs and three grounded capacitors. Five types of transfer functions, namely, low-pass, high-pass, band-pass, band-reject, and all-pass responses, can be obtained without changing the circuit topology. The pole-Q (Q 0) and the pole-frequency (ω 0) parameters are independently tuned. The Q 0 and ω 0 parameters are electronically tuned by adjusting the transconductance gains of the OTAs. Furthermore, Q 0 can be tuned by varying the capacitor manually without affecting ω 0. SPICE simulation results of the proposed filter are presented.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. R.F. Ahmed, I.A. Awad, A.M. Soliman, A transformation method from voltage-mode OP-amp-RC circuits to current-mode Gm-C circuits. Circuits Syst. Signal Process. 25, 609–626 (2006)

    Article  MATH  MathSciNet  Google Scholar 

  2. S.I. Liu, J.J. Chen, Y.S. Hwang, New Current mode biquad filters using current follower. IEEE Trans. Circuits Syst. 42, 380–383 (1995)

    Article  Google Scholar 

  3. E.O. Gunes, A. Toker, S. Ozoguz, Insensitive current-mode universal filter with minimum component using dual-output current conveyors. Electron. Lett. 35, 524–525 (1999)

    Article  Google Scholar 

  4. A. Fabre, O. Saaid, F. Wiest, C. Boucheron, Current controlled bandpass filter based on translinear conveyors. Electron. Lett. 31, 1727–1728 (1995)

    Article  Google Scholar 

  5. A.M. Soliman, New current-mode biquad filters using current conveyors. Int. J. Electron. Commun. (AEÜ) 51, 275–278 (1997)

    Google Scholar 

  6. C. Chang, New multifunction OTA-C biquads. IEEE Trans. Circuits Syst. 46, 820–824 (1999)

    Google Scholar 

  7. C. Chang, S. Pai, Universal current-mode OTA-C biquad with the minimum components. IEEE Trans. Circuits Syst. 47, 1235–1238 (2000)

    Article  Google Scholar 

  8. C. Chang, B.M. Al-Hashimi, J.N. Ross, Unified active filter biquad structure. IEE Proc. Circuits Dev. Syst. 151, 273–277 (2004)

    Article  Google Scholar 

  9. J. Wu, Current-mode high-order OTA-C filter. Int. J. Electron. 76, 1115–1120 (1994)

    Article  Google Scholar 

  10. M.T. Abuelma’atti, A. Bentrcia, New universal current-mode multiple-input multiple-output OTA-C filter. In: IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2004, pp. 1037–1039 (2004)

  11. E. Sanchez-sinencio, R.L. Geiger, H. Nevarez-Lozano, Generation of continuous-time two integrator loop OTA filter structures. IEEE Trans. Circuits Syst. 35, 936–946 (1988)

    Article  Google Scholar 

  12. J. Wu, E. El-Masry, Design of current-mode ladder filters using coupled-biquads. IEEE Trans. Circuits Syst. 45, 1445–1454 (1998)

    Article  Google Scholar 

  13. C.M. Chang, C.L. Hou, W.Y. Chung, J.W. Horng, C.K. Tu, Analytical synthesis of high-order single-ended-input OTA-grounded C all-pass and band-reject filter structures. IEEE Trans. Circuits Syst. 53, 489–498 (2006)

    Article  Google Scholar 

  14. S.H. Tu, C.M. Chang, J.N. Ross, M.N.S. Swamy, Analytical synthesis of current-mode high-order single-ended-input OTA and equal-capacitor elliptic filter structures with the minimum number of components. IEEE Trans. Circuits Syst. 54, 2195–2210 (2007)

    Article  Google Scholar 

  15. C.M. Chang, A.M. Soliman, M.N.S. Swamy, Analytical synthesis of low-sensitivity high-order voltage-mode DDCC and FDCCII-grounded R and C all-pass filter structures. IEEE Trans. Circuits Syst. 54, 1430–1443 (2007)

    Article  Google Scholar 

  16. H. Pevarez-Lozano, E. Sanchez-Sinencio, Minimum parasitic effects biquadratic OTA-C filter architectures. Analog Integr. Circuits Signal Process. 1, 297–319 (1991)

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Telecommunications Engineering, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand

    Pipat Prommee & Thanate Pattanatadapong

Authors
  1. Pipat Prommee
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Thanate Pattanatadapong
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Pipat Prommee.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Prommee, P., Pattanatadapong, T. Realization of Tunable Pole-Q Current-Mode OTA-C Universal Filter. Circuits Syst Signal Process 29, 913–924 (2010). https://doi.org/10.1007/s00034-010-9189-1

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00034-010-9189-1

Keywords

Search

Navigation