Ersin ALAYBEYOGLU, Hulusi Hakan KUNTMAN

A new CMOS ZC-CDTA realization and its filter applications

The Z copy current differencing transconductance amplifier (ZC-CDTA) is a new current-mode active element that was introduced recently. ZC-CDTA is improved from the current differencing transconductance amplifier (CDTA) and has increased its universality. In the current study, a CMOS implementation of ZC-CDTA is proposed. The first stage of ZC-CDTA consists of a current differencing unit. The output stage consists of a dual output transconductance amplifier. Furthermore, a third-generation current conveyor is used to copy the Z terminal current instead of a classical current mirror. A fourth-order filter application employing ZC-CDTAs is given and simulation results are added. The ZC-CDTA-based filter is designed starting from a previous filter structure that employed conventional CDTAs. Thanks to the Z copy, the high-pass filter output problem is solved for the conventional CDTA filter structure. AMS 0.18-µm CMOS parameters are used for the simulations.

PDF

___

[1] Wilson B. Performance analysis of current conveyors. Electron Lett 1989; 25: 15961598.
[2] Toumazou C, Lidjey FJ, Haigh D. Analog IC Design: The Current-Mode Approach. Stevenage, UK: IET, 1990.
[3] Palmisano G, Palumbo G, Pennisi S. CMOS Current Amplifiers. Boston, MA, USA: Kluwer, 1999.
[4] Kuntman H. New trends in circuit design for analog signal processing. In: Proceedings of the 7th International Conference on Electrical and Electronics Engineering; 14 December 2011; Bursa, Turkey. New York, NY, USA: IEEE. pp. 1825.
[5] Kuntman H, Uygur A. New possibilities and trends in circuit design for analog signal processing. In: 2012 International Conference on Applied Electronics; 57 September 2012; Pilsen, Czech Republic. New York, NY, USA: IEEE. pp. 312.
[6] Biolek D, Senani R, Biolkova V, Kolka Z. Active elements for analog signal processing: classification, review and new proposals. Radioengineering 2008; 17: 1534.
[7] Fabre A. Third generation current conveyor: a new active element. Electron Lett 1995; 31: 338339.
[8] Surakampotorn W, Kumwatchara K. CMOS-based electronically tunable current conveyor. Electron Lett 1992; 28: 13161317.
[9] Altun M, Kuntman H, Minaei S, Sayin OK. Realization of nth-order current transfer function employing ECCIIs and application examples. Int J Electron 2009; 96: 11151126.
[10] Lakys Y, Godara B, Fabre A. Cognitive and encrypted communications: state of the art and a new approach for frequency agile filters. Turk J Electr Eng Co 2011; 19: 251273.
[11] Arma˘gan E, Kuntman H. Design of balanced differential pair based CCCII circuit and configurable frequency agile filter application in 28nm process. In: 2012 Conference on Electrical and Electronics Engineering; 29 November1 December 2012; Bursa, Turkey. pp. 257261.
[12] Armagan E, Kuntman H. Configurable frequency agile filter application of balanced differential pair based CCCII circuit in 28nm process. In: IEEE 2013 Latin American Symposium on Circuits and Systems; 27 February1 March 2013; Cusco, Peru. New York, NY, USA: IEEE. pp. 14.
[13] Arbel A, Goldminz L. Output stage for current-feedback amplifiers, theory and applications. Analog Integr Circ S 1992; 2: 243255.
[14] Ka¸car F, Kuntman H. A new, improved CMOS realization of CDTA and its filter application. Turk J Electr Eng Co 2011; 19: 631642.
[15] Alaybeyo˘glu E, Kuntman H. A new CMOS ZC-CDTA realization and its filter application. In: 2012 Conference on Electrical and Electronics Engineering; 29 November1 December 2012; Bursa, Turkey. pp. 262266.
[16] Alaybeyo˘glu E. Analog circuit design with new active circuit components. MSc, ˙Istanbul Technical University, ˙Istanbul, Turkey, 2013.
[17] Haykin S. Cognitive radio: brain-empowered wireless communications. IEEE J Sel Area Comm 2005; 23: 201220.
[18] Razavi B. RF Microelectronics. 1st ed. Upper Saddle River, NJ, USA: Prentice Hall, 1997.
[19] Smith KC, Sedra A. A second generation current conveyor and its applications. IEEE T Circuit Theory 1970; 17: 132134.
[20] Biolek D. CDTABuilding block for current-mode analog signal processing. In: Proceedings of the European Conference on Circuit Theory and Design; 14 September 2003; Krakow, Poland. New York, NY, USA: IEEE. pp.397400.
[21] Acar C, Ozoguz S. A new versatile building block: current differencing buffered amplifier suitable for analog signalprocessing filters. Microelectr J 1999; 30: 157160.
[22] Minaei S, Yıldız M, T¨urk¨oz S, Kuntman H. High swing CMOS realization for third generation current conveyor (CCIII). J Electr Electron Eng 2003; 3: 819826.