Share This Article:

Realization of a New Current Mode Second-Order Biquad Using Two Current Follower Transconductance Amplifiers (CFTAs)

Abstract Full-Text HTML XML Download Download as PDF (Size:2014KB) PP. 113-120
DOI: 10.4236/cs.2015.65012    3,231 Downloads   3,739 Views   Citations

ABSTRACT

A new circuit for realization of universal current-mode filter using current Follower Transconductance Amplifiers (CFTAs) is presented. The proposed circuit realizes current-mode low pass, high pass and band pass filter functions simultaneously with a single current source at the input. The band reject and all pass filters can also be obtained from the proposed circuit without any extra hardware. The proposed circuit employs three passive grounded elements and two CFTAs. Linear electronic control of natural frequency ω0 is available in the proposed circuit. The quality factor can be independently adjusted through grounded resistor. The proposed circuit employs two grounded capacitors and a grounded resistor along with two CFTAs. The grounded resistor can be replaced by an OTA based circuit for linear electronic control of quality factor Q0. The circuit exhibits low active and passive sensitivities for ω0 and Q0. Simulation results are obtained using PSPICE software which is in conformity with the theoretical findings.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Walde, N. and Ahmad, S. (2015) Realization of a New Current Mode Second-Order Biquad Using Two Current Follower Transconductance Amplifiers (CFTAs). Circuits and Systems, 6, 113-120. doi: 10.4236/cs.2015.65012.

References

[1] Toumazou, C., Lidgey, F.J. and Haigh, D.G., Eds. (1990) Analogue IC Design: The current mode Approach. Peter Peregrinus Ltd., London.
[2] Sedra, A. and Smith, K.C. (1970) A Second-Generation Current Conveyor and Its Applications. IEEE Transactions on Circuit Theory, 17, 132-134.
http://dx.doi.org/10.1109/TCT.1970.1083067
[3] Geiger, R.L. and Sanchez-Sinencio, E. (1985) Active Filter Design Using Operational Transconductance Amplifiers: A Tutorial. IEEE Circuits and Devices Magazine, 1, 20-32.
[4] Biolek, D. (2003) CDTA—Building Block for Current-Mode Analog Signal Processing. Proceedings of the European Conference on Circuit Theory and Design (ECCTD ’03), Krakow, 397-400.
[5] Uygur, A., Kuntman, H. and Zeki, A. (2005) Multi-Input Multi-Output CDTA-Based KHN Filter. Proc. Int. Conf. Electrical and Electronics, Bursa.
[6] Biolek, D., Senani, R., Biolkova, V. and Kolka, Z. (2008) Active Elements for Analog Signal Processing: Classification, Review, and New Proposals. Radioengineering, 17, 15-32.
[7] Tangsrirat, W. (2009) Cascadable Current-Controlled Current-Mode Universal Filters Using CDTAs and Grounded Capacitors. Journal of Active and Passive Electronic Devices, 4, 135-145.
[8] Herencsar, N., Koton, J., Vrba, K. and Misurec, J. (2009) A Novel Current-Mode SIMO Type Universal Filter Using CFTAs. Contemporary Engineering Sciences, 2, 59-66.
[9] Prommee, P., Angkeaw, K., Somdunyakanok, M. and Dejhan, K. (2009) CMOS-Based near Zero-Offset Multiple Inputs Max-Min Circuits and Its Applications. Analog Integrated Circuits and Signal Processing, 61, 93-105.
[10] Tangsrirat, W. (2010) Novel Current-Mode and Voltage-Mode Universal Biquad Filters Using Single CFTA. Indian Journal of Engineering and Materials Sciences, 17, 99-104.
[11] Herencsar, N., Koton, J. and Vrba, K. (2010) Realization of Current-Mode KHN-Equivalent Biquad Using Current Follower Transconductance Amplifiers (CFTAs). IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences A, E93-A, 1816-1819.
http://dx.doi.org/10.1587/transfun.E93.A.1816
[12] Tangsrirat, W. (2011) Single-Input Three-Output Electronically Tunable Universal Current-Mode Filter Using Current Follower Transconductance Amplifiers. International Journal of Electronics and Communications, 65, 783-787.
[13] Herencsar, N., Koton, J., Vrba, K. and Lattenberg, I. (2011) Current Follower Transconductance Amplifier (CFTA)— A Useful Building Block for Analog Signal Processing. Journal of Active and Passive Electronic Devices, 6, 217-229.
[14] Satansup, J. and Tangsrirat, W. (2011) Realization of Current-Mode KHN-Equivalent Biquad Filter Using ZC-CFTAs and Grounded Capacitors. Indian Journal of Pure and Applied Physics, 49, 841-846.
[15] Iamarejin, A., Maneewan, S., Suwanjan, P. and Jaikla, W. (2013) Current-Mode Variable Current Gain First-Order Allpass Filter Employing CFTAs. Przeglad Elektrotechniczny, 89, 238-241.
[16] Satansup, J., Pukkalanun, T. and Tangsrirat, W. (2011) Current-Mode KHN Biquad Filter Using Modified CFTAs and Grounded Capacitors. Proceedings of the International Multi Conference of Engineers and Computer Scientists, Hong Kong, 16-18 March 2011.
[17] Satansup, J. and Tansrirat, W. (2011) Realization of Current-Mode KHN-Equivalent Using ZC-CFTAs and Grounded Capacitors. Indian Journal of Pure & Applied Physics, 49, 841-846.
[18] Singh, B., Singh, A.K. and Senani, R. (2012) New Universal Current-Mode Biquad Using Only Three ZC-CFTAs. Radio Engineering, 21, 273-280.
[19] Wisut, S.L. and Siripruchyanun, M. (2012) A Current-Mode Multifunction Biquadratic Filter Using CFTAs. The Journal of KMUTNB, 22, 479-485.
http://dx.doi.org/10.14416/j.kmutnb.2012.03.002
[20] Singh, S.V., Tomar, R.S. and Chauhan, D.S. (2014) ZC-CFTA-Based Trans-Impedance-Mode Universal Biquad Filter with Electronic Tuning. IEEE International Conference on Signal Processing and Integrated Networks (SPIN), Noida, 20-21 February 2014, 543-548.
[21] Suwanjan, P. and Jaikla, W. (2012) CFTA Based MISO Current-Mode Biquad Filter. Proceedings of the Recent Researches in Circuits, Systems, Multimedia and Automatic Control, Rovaniemi, 18-20 April 2012, 93-97.
[22] Tangsrirat, W. (2014) SFG Synthesis of General High-Order All-Pass and All-Pole Current Transfer Functions Using CFTAs. The Scientific World Journal, 2014, 1-5.
[23] Herencsar, N., Koton, J., Vrba, K. and Lahiri, A. (2010) Current-Controlled CFTA-Based Current-Mode SITO Universal Filter and Quadrature Oscillator. Proceedings of the 2010 International Conference on Applied Electronics (AE), Pilsen, 8-9 September 2010, 1-4.

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.