A Voltage Gain-Controlled Modified CFOA And Its Application in Electronically Tunable Four-Mode All-Pass Filter Design

Norbert Herencsar, Jaroslav Koton, Abhirup Lahiri, Bilgin Metin, Kamil Vrba

Abstract


This paper presents a new active building block (ABB) called voltage gain-controlled modified current feedback amplifier (VGC-MCFOA) based on bipolar junction transistor technology. The versatility of the new ABB is demonstrated in new first-order all-pass filter structure design employing single VGC-MCFOA, single grounded capacitor, and three resistors. Introduced circuit provides all four possible transfer functions at the same configuration, namely current-mode, transimpedance-mode, transadmittance-mode, and voltage-mode. The pole frequency of the circuit can be easily tuned by means of DC bias currents. The theoretical results are verified by SPICE simulations based on bipolar transistor arrays AT&T ALA400-CBIC-R process parameters.

Full Text:

PDF

References


A. S. Sedra and K. C. Smith, “A second-generation current conveyor and its applications,” IEEE Trans. Circuit Theory, vol. 17, no. 1, pp. 132–134, 1970.

K. C. Smith and A. S. Sedra, “Realization of the Chua family of new nonlinear network elements using the current conveyor,” IEEE Trans. Circuit Theory, vol. 17, pp. 137–139, 1970.

E. Yuce, “On the implementation of the floating simulators employing a single active device,” AEU–Int. J. Electron. and Commun., vol. 61, no. 7, pp. 453–458, 2007.

E. Yuce and S. Minaei, “A modified CFOA and its applications to simulated inductors, capacitance multipliers, and analog filters,” IEEE Trans. Circuits and Systems—I, vol. 55, no. 1, pp. 254–263, 2008.

N. Herencsar, J. Koton, K. Vrba, and O. Cicekoglu, “Single UCC-N1B 0520 device as a modified CFOA and its application to voltage- and current-mode universal filters,” In Proc. of the Int. Conf. on Applied Electronics - APPEL 2009, Pilsen, Czech Republic, pp. 127–130, 2009.

N. Herencsar, J. Koton, and K. Vrba, “Voltage-mode universal filters employing single modified current feedback operational amplifier (MCFOA),” In Proc. of the 6th Int. Conf. on Electrical and Electronics Engineering - ELECO 2009, Bursa, Turkey, pp. 83–87, 2009.

E. Yuce, “Fully integrable mixed-mode universal biquad with specific application of the CFOA,” AEU–Int. J. Electron. and Commun., vol. 64, no. 4, pp. 304–309, 2010.

J. A. Svoboda, L. McGory, and S. Webb, “Applications of a commercially available current conveyor,” Int. J. Electronics, vol. 70, pp. 159-164, 1991.

A. Fabre, O. Saaid, F. Wiest, and C. Boucheron, “High frequency applications based on a new current controlled conveyor,” IEEE Trans. Circuits and Systems—I, vol. 43, pp. 82–91, 1996.

W. Chiu, S. I. Liu, H. W. Tsao, J. J. Chen, “CMOS differential difference current conveyors and their applications,” IEE Proceedings—Circuits, Devices and Systems, vol. 144, no. 2, pp. 91–96, 1996.

D. Becvar, K. Vrba, V. Zeman, and V. Musil, “Novel universal active block: a universal current conveyor,” In Proc. of the IEEE Int. Symposium on Circuits and Systems - ISCAS 2000, Geneva, Switzerland, pp. 471–474, 2000.

J. Cajka, T. Dostal, and K. Vrba, “General view on current conveyors,” Int. J. of Circuit Theory and Applications, vol. 32, pp. 133–138, 2004.

N. Herencsar and K. Vrba, “Current conveyors-based circuits using novel transformation method,” IEICE Electron. Express, vol. 4, no. 21, pp. 650–656, 2007.

J. Jerabek and K. Vrba, “SIMO type low-input and high-output impedance current- mode universal filter employing three universal current conveyors,” AEU–Int. J. Electron. and Commun., vol. 64, no. 6, pp. 588–593, 2010.

A. Zeki and A. Toker, “The dual-X current conveyor (DXCCII): a new active device for tunable continuous-time filters,” Int. J. Electronics, vol. 89, pp. 913–923, 2002.

C. Acar and S. Ozoguz, “A new versatile building block: current differencing buffered amplifier suitable for analog signal processing filters,” Microelectron. J., vol. 30, pp. 157–160, 1999.

J. Koton, N. Herencsar, and K. Vrba, “KHN-equivalent voltage-mode filters using universal voltage conveyors,” AEU–Int. J. Electron. and Commun., vol. 65, no. 2, pp. 154–160, 2011.

R. L. Geiger and E. Sanchez-Sinencio, “Active filter design using operational transconductance amplifiers: A tutorial,” IEEE Circuits Devices Mag., vol. 1, pp. 20-32, 1985.

D. Biolek, “CDTA - building block for current-mode analog signal processing,” In Proc. of the 16th European Conf. on Circuit Theory and Design - ECCTD 2003, Krakow, Poland, pp. 397–400, 2003.

R. Prokop and V. Musil, “Modular approach to design of modern circuit blocks for current signal processing and new device CCTA,” In Proc. of the Seventh IASTED Int. Conf. on Signal and Image Processing - SIP 2005, Anaheim, USA, pp. 494–499, 2005.

N. Herencsar, K. Vrba, J. Koton, and I. Lattenberg, “The conception of differential-input buffered and transconductance amplifier (DBTA) and its application,” IEICE Electron. Express, vol. 6, pp. 329–334, 2009.

N. Herencsar, J. Koton, and K. Vrba, “Realization of current-mode KHN-equivalent biquad using current follower transconductance amplifiers (CFTAs),” IEICE Trans. Fundamentals, vol. E93-A, no. 10, pp. 1816–1819, 2010.

U. E. Ayten, M. Sagbas, N. Herencsar, and J. Koton, “Novel floating general element simulators using CBTA,” Radioengineering, vol. 21, no. 1, pp. 11–19, 2012.

N. Herencsar, A. Lahiri, J. Koton, K. Vrba, and B. Metin, “Realization of resistorless lossless positive and negative grounded inductor simulators using single ZC-CCCITA,” Radioengineering, vol. 21, no. 1, pp. 264–272, 2012.

W. Surakampontorn and P. Thitimajshima, “Integrable electronically tunable current conveyors,” IEE Proceedings—G, vol. 135, no. 2, pp. 71–77, 1988.

S. Minaei, O. K. Sayin, and H. Kuntman, “A new CMOS electronically tunable current conveyor and its application to current-mode filters,” IEEE Trans. Circuits and Systems—I, vol. 53, pp. 1448–1457, 2006.

N. Herencsar, A. Lahiri, K. Vrba, and J. Koton, “An electronically tunable current-mode quadrature oscillator using PCAs,” Int. J. Electronics, vol. 99, no. 5, pp. 609–621, 2012.

A. Fabre and N. Mimeche, “Class A/AB second-generation current conveyor with controlled current gain,” Electron. Lett., vol. 30, no. 16, pp. 1267–1268, 1994.

A. De Marcellis, G. Ferri, N. C. Guerrini, G. Scotti, V. Stornelli, and A. Trifiletti, “The VCG-CCII: a novel building block and its application to capacitance multiplication,” Analog Integr. Circ. and Signal Process., vol. 58, no. 1, pp. 55–59, 2009.

E. Yuce, K. Pal, and S. Minaei, “A high input impedance voltage-mode all-pass/notch filter using a single variable gain current conveyor,” J. Circuits, Systems, and Computers, vol. 17, pp. 827–834, 2008.

D. R. Frey, “Log-domain filtering: an approach to current mode filtering,” IEE Proceedings—Circuits, Devices and Systems, vol. 140, no. 6, pp. 406–416, 1993.

N. Herencsar, J. Koton, K. Vrba, A. Lahiri, and B. Metin, “Novel dual-mode electronically tunable all-pass filter using voltage gain-controlled MCFOA,” In Proc. of the 13th Int. Conf. on Optimization of Electrical and Electronic Equipment - OPTIM 2012, Brasov, Romania, pp. 1199–1202, May 2012. DOI: 10.1109/OPTIM.2012.6231848




DOI: http://dx.doi.org/10.11601/ijates.v1i1.27

Refbacks

  • There are currently no refbacks.