Skip to main content
SpringerLink
Log in

Linearly Tunable Transconductor Using Modified CDBA

  • Published:
Analog Integrated Circuits and Signal Processing Aims and scope Submit manuscript

Abstract

With a slight modification in current differencing buffered amplifier (CDBA), a new block, namely differential-input current feedback amplifier (DFCA), is obtained. It is shown that, with two additional MOSFETs, this modified CDBA structure can be utilized as a linearly tunable transconductor, which can also be converted to a variable-gain amplifier or an analogue multiplier.

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. Toumazou, C. and Lidgey, J., “Current feedback op-amps: A blessing in disguise?” IEEE Circuits and Devices Magazine, 10, pp. 34-37, 1994.

    Google Scholar 

  2. Acar, C. and Özoĝuz, S., “A new versatile building block: Current differencing buffered amplifier suitable for analog signal processing filters.” Microelectronics J., 30, pp. 157-160, 1999.

    Google Scholar 

  3. Chen, J. J., Tsao, H. W., Liu, S. I. and Chiu, W., “Parasiticcapacitance-insensitive current-mode filters using operational transresistance amplifiers.” Proc. IEE, 142, pp. 186-192, 1995.

    Google Scholar 

  4. Salama, K. N. and Soliman, A. M., “CMOS operational transresistance amplifier for analog signal processing.” Microelectronics Journal, 30, pp. 235-245, 1999.

    Google Scholar 

  5. Özo?uz, S., Toker, A. and Acar, C., “Current-mode continuostime fully integrated universal filter using CDBAs.” Electron. Letters, 35, pp. 97-98, 1999.

    Google Scholar 

  6. Likittanapong, P., Worapishet, A. and Toumazou, C., “Linear CMOS transconductor for low-voltage applications.” Electronics Letters, 34, pp. 1224-1225, June 1998.

    Google Scholar 

  7. Wyszy?ski, A., “Low-voltage CMOS and BiCMOS triode transconductors and integrators with gain-enhanced linearity and output impedance.” Electronics Letters, 30, pp. 211-213, Feb. 1994.

    Google Scholar 

  8. Lee, S. O., Park, S. B. and Lee, K. R., “New CMOS triode transconductor.” Electronics Letters, 30, pp. 946-948, June 1994.

    Google Scholar 

  9. Mahattanakul, J. and Toumazou, C., “Tunable BiCMOS transconductance amplifiers.” Electronics Letters, 34, pp. 175-176, Jan. 1998.

    Google Scholar 

  10. Zeki, A., “Low-voltage CMOS triode transconductor with widerange and linear tunability.” Electronics Letters, 35, pp. 1685-1686, Sept. 1999.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Faculty of Electrical and Electronics Eng., Electronics and Communication Eng. Dept., Istanbul Technical University, 80626, Maslak, Istanbul, Turkey Phone

    Ali Zeki, Ali Toker & Serdar Özo uz

Authors
  1. Ali Zeki
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Ali Toker
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Serdar Özo uz
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Zeki, A., Toker, A. & Özo uz, S. Linearly Tunable Transconductor Using Modified CDBA. Analog Integrated Circuits and Signal Processing 26, 179–183 (2001). https://doi.org/10.1023/A:1011250418502

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1011250418502

Keywords

Search

Navigation