Skip to main content

New resistorless and electronically tunable realization of dual-output VM all-pass filter using VDIBA


In this paper, a new active element called voltage differencing inverting buffered amplifier (VDIBA) is presented. Using single VDIBA and a capacitor, a new resistorless voltage-mode (VM) first-order all-pass filter (APF) is proposed, which provides both inverting and non-inverting outputs at the same configuration simultaneously. The pole frequency of the filter can be electronically controlled by means of bias current of the internal transconductance. No component-matching conditions are required and it has low sensitivity. In addition, the parasitic and loading effects are also investigated. By connecting two newly introduced APFs in open loop a novel second-order APF is proposed. As another application, the proposed VM APF is connected in cascade to a lossy integrator in a closed loop to design a four-phase quadrature oscillator. The theoretical results are verified by SPICE simulations using TSMC 0.18 μm level-7 CMOS process parameters with ±0.9 V supply voltages. Moreover, the behavior of the proposed VM APF was also experimentally measured using commercially available integrated circuit OPA860 by Texas Instruments.

This is a preview of subscription content, access via your institution.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14
Fig. 15
Fig. 16
Fig. 17
Fig. 18
Fig. 19
Fig. 20
Fig. 21
Fig. 22
Fig. 23


  1. Maheshwari, S. (2009). Analogue signal processing applications using a new circuit topology. IET Circuits, Devices Systems, 3(3), 106–115.

    Article  Google Scholar 

  2. Minaei, S., & Yuce, E. (2010). Novel voltage-mode all-pass filter based on using DVCCs. Circuits, Systems, and Signal Processing, 29(3), 391–402.

    Article  MATH  Google Scholar 

  3. Maheshwari, S. (2004). New voltage and current-mode APS using current controlled conveyor. International Journal of Electronics, 91(12), 735–743.

    Article  Google Scholar 

  4. Minaei, S., & Cicekoglu, O. (2006). A resistorless realization of the first-order all-pass filter. International Journal of Electronics, 93(3), 177–183.

    Article  Google Scholar 

  5. Kumar, P., Keskin, A. U., & Pal, K. (2007). Wide-band resistorless allpass sections with single element tuning. International Journal of Electronics, 94(6), 597–604.

    Article  Google Scholar 

  6. Maheshwari, S. (2008). A canonical voltage-controlled VM-APS with a grounded capacitor. Circuits Systems and Signal Processing, 27(1), 123–132.

    Article  Google Scholar 

  7. Metin, B., & Pal, K. (2010). New all-pass filter circuit compensating for C-CDBA non-idealities. Journal of Circuits Systems and Computers, 19(2), 381–391.

    Article  Google Scholar 

  8. Bajer, J., & Biolek, D. (2010). Voltage-mode electronically tunable all-pass filter employing CCCII+, one capacitor and differential-input voltage buffer. In Proceedings of the 2010 IEEE 26-th convention of electrical and electronics engineers in Israel, Eilat, Israel, pp. 934–937.

  9. Metin, B., Pal, K., & Cicekoglu, O. (2011). CMOS controlled inverting CDBA with a new all-pass filter application. International Journal of Circuit Theory and Applications, 39(4), 417–425.

    Article  Google Scholar 

  10. Herencsar, N., Koton, J., Vrba, K., & Metin, B. (2011). Novel voltage conveyor with electronic tuning and its application to resistorless all-pass filter. In Proceedings of the 2011 34th international conference on telecommunications and signal processing (TSP), Budapest, Hungary, pp. 265–268.

  11. Biolkova, V., Kolka, Z., & Biolek, D. (2011). Dual-output all-pass filter employing fully-differential operational amplifier and current-controlled current conveyor. In Proceedings of the 7th international conference on electrical and electronics engineeringELECO 2011, Bursa, Turkey, pp. 319–323.

  12. Toker, A., & Ozoguz, S. (2003). Tunable allpass filter for low voltage operation. Electronics Letters, 39(2), 175–176.

    Article  Google Scholar 

  13. Metin, B., Pal, K., & Cicekoglu, O. (2011). All-pass filters using DDCC- and MOSFET-based electronic resistor. International Journal of Circuit Theory and Applications, 39(8), 881–891.

    Google Scholar 

  14. Herencsar, N., Koton, J., Vrba, K., & Minaei, S. (2011). Electronically tunable MOSFET-C voltage-mode all-pass filter based on universal voltage conveyor. In Proceedings of the international conference on computer and communication deviceICCCD 2011, Bali Island, Indonesia, Vol. 1, pp. 53–56.

  15. Herencsar, N., Koton, J., Jerabek, J., Vrba, K., & Cicekoglu, O. (2011). Voltage-mode all-pass filters using universal voltage conveyor and MOSFET-based electronic resistors. Radioengineering, 20(1), 10–18.

    Google Scholar 

  16. Minaei, S., & Yuce, E. (2012). High input impedance NMOS-based phase shifter with minimum number of passive elements. Circuits, Systems, and Signal Processing, 31(1), 51–60.

    Article  MathSciNet  Google Scholar 

  17. Biolek, D., & Biolkova, V. (2010). First-order voltage-mode all-pass filter employing one active element and one grounded capacitor. Analog Integrated Circuits and Signal Processing, 65(1), 123–129.

    Article  Google Scholar 

  18. Khan, I. A., & Ahmed, M. T. (1986). Electronically tunable first-order OTA-capacitor filter sections. International Journal of Electronics, 61(2), 233–237.

    Article  Google Scholar 

  19. Kumngern, M., Chanwutitum, J., & Dejhan, K. (2008). Electronically tunable voltage-mode all-pass filter using simple CMOS OTAs. In Proceedings of the 2008 international symposium on communications and information technologiesISCIT 2008, Vientiane, Laos, pp. 1–5.

  20. Tanaphatsiri, C., Jaikla, W., & Siripruchyanun, M. (2008). An electronically controllable voltage-mode first-order all-pass filter using only single CCCDTA. In Proceedings of the 2008 international symposium on communications and information technologiesISCIT 2008, Vientiane, Laos, pp. 305–309.

  21. Herencsar, N., Koton, J., & Vrba, K. (2009). A new electronically tunable voltage-mode active-C phase shifter using UVC and OTA. IEICE Electronics Express, 6(17), 1212–1218.

    Article  Google Scholar 

  22. Pandey, N., Arora, P., Kapur, S., & Malhotra, S. (2011). First order voltage mode MO-CCCCTA based all pass filter. In Proceedings of the 2011 international conference on communications and signal processingICCSP 2011, Kerala, India, pp. 535–537.

  23. Keskin, A. U., Pal, K., & Hancioglu, E. (2008). Resistorless first order all-pass filter with electronic tuning. AEU—International Journal of Electronics and Communications, 62(4), 304–306.

    Google Scholar 

  24. Fabre, A., Saaid, O., Wiest, F., & Boucheron, C. (1996). High frequency applications based on a new current controlled conveyor. IEEE Transactions on Circuits Systems-I, 43(2), 82–91.

    Article  Google Scholar 

  25. Geiger, R. L., & Sanchez-Sinencio, E. (1985). Active filter design using operational transconductance amplifiers: a tutorial. IEEE Circuits Devices Magazine, 1, 20–32.

    Article  Google Scholar 

  26. Biolek, D., Senani, R., Biolkova, V., & Kolka, Z. (2008). Active elements for analog signal processing: classification, review, and new proposals. Radioengineering, 17(4), 15–32.

    Google Scholar 

  27. OPA860—Wide bandwidth operational transconductance amplifier (OTA) and buffer, Texas Instruments, SBOS331C–June 2005–Revised August 2008,

  28. Maheshwari, S., Mohan, J., & Chauhan, D. S. (2011). Novel cascadable all-pass/notch filters using a single FDCCII and grounded capacitors. Circuits, Systems, and Signal Processing, 30(3), 643–654.

    Article  MATH  Google Scholar 

  29. Herencsar, N., Koton, J., Minaei, S., Yuce, E., & Vrba, K. (2011). Novel resistorless dual-output VM all-pass filter employing VDIBA. In Proceedings of the 7th international conference on electrical and electronics engineeringELECO 2011, Bursa, Turkey, pp. 72–74.

Download references


The research described in the paper was supported by the following projects: P102/11/P489, P102/10/P561, P102/09/1681, FEKT-S-11-15, and project SIX CZ.1.05/2.1.00/03.0072 from the operational program Research and Development for Innovation. Authors also wish to thank Prof. Dr. Serdar Ozoguz from the Istanbul Technical University, Turkey, for his discussions made on the proposed circuit and the anonymous reviewers for their useful and constructive comments that helped to improve the paper. A preliminary version of this paper has been presented at the 7th International Conference on Electrical and Electronics Engineering—ELECO 2011 [29].

Author information

Authors and Affiliations


Corresponding author

Correspondence to Norbert Herencsar.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Herencsar, N., Minaei, S., Koton, J. et al. New resistorless and electronically tunable realization of dual-output VM all-pass filter using VDIBA. Analog Integr Circ Sig Process 74, 141–154 (2013).

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI:


  • Analog signal processing
  • All-pass filter
  • Electronically tunable circuit
  • Four-phase quadrature oscillator
  • Loading effect
  • Resistorless filter
  • Voltage-mode
  • Voltage differencing inverting buffered amplifier (VDIBA)