CDBA Based Voltage-Mode First-Order All-pass Filter Topologies

Five new configurations realizing canonical first-order voltage-mode all-pass filter configurations using a single current differencing buffer amplifier (CDBA) are given. Two of these filter configurations, which were also canonical all-pass filters, contained four passive elements, while the others contained five passive elements. The circuits are suited for CMOS implementation. The SPICE simulation results for frequency response as well as transient response are incorporated to verify the theory.

Keywords:

CDBA Active Filters, All Pass Filter,

PDF

___

M. C. H. Cheng, C. Toumazou, ―3V MOS current conveyor cell for VLSI technology‖, Electr Lett vol. 29, pp. 317-318, 1993.
AD Inc., ―AD844 current feedback op-amp‖, Data Sheet.
W. Surakampontorn, P. Thitimajshima, ―Integrible electronically tunable current conveyors‖, IEE Proceedings Pt. G., pp. 71–77, 1988.
H. O. Elwan, A. M. Soliman, ‖Novel CMOS differential voltage current conveyor and its applications‖, IEE Proceedings Pt. G. pp.195–200,1997.
W. Chiu, S. I. Liu, H. W. Tsao, J. J. Chen, ―CMOS differential difference current conveyors and their applications‖, IEE Proceedings Pt, pp. 91–96, 1996.
A. Fabre, ―3rd-generation current conveyor – a new helpful active element‖, Electronics Letters, vol. 31, pp. 338–339, 1995.
J. H. Huijsing, J. De Korte, ―Monolithic nullor: A universal active element‖, Solid State Circuits vol. 12, pp.50–64, 1997.
H. Kuntman, A. Özpinar, ―On the realization of the DOOTA-C oscillators‖, Microelec J, vol.29, pp. 991–997, 1998.
C. Acar, S. Özoguz, ―A new versatile building block: Current differencing buffered amplifier suitable for analog signal processing filters‖, Microelec J, vol.30, pp.157–160, 1999.
S. Özoguz, A. Toker, M. A. İbrahim, C. Acar, ―A new versatile building block: Current differencing amplifier and its applications‖, In Proceedings of The European Conference on Circuit Theory and Design, ECCTD’99,pp. 90-93, 1999.
S. Özoguz, A. Toker, C. Acar, ―A new current-mode continuous time fully integrated universal filters‖, Elect Lett, vol. 35, pp. 97–98,1999.
A. Toker, S. Özoguz, O. Çiçekoğlu, C. Acar, ― Current mode allpass filters using CDBA and a new high Q bandpass filter configuration‖, IEEE Transactions on Circuits and Systems, vol.47, pp. 949-954,2000.
C. Acar, H. Sedef, ―Realization of nth-order current transfer function using current differencing buffered amplifiers‖, Int J Electron, vol.90, pp.277-283,2003.
A. Toker, S. Ozoguz, C. Acar, ―Current-mode KHNequivalent biquad using CDBAs‖, Elect Lett vol. 35, pp.1682-1683,1999.
W. Tangsrirat, W. Surakampontorn, N. Fujii, ―Realization of leapfrog filters using current differencing buffered amplifiers‖, IEICE Trans Fundamentals, (Japan), vol.86, pp.318-326,2003.
H. Sedef, C. Acar, ―On the realization of voltage-mode filters using CDBA‖, Frequenz, vol.54, pp.198202,2000.
K. N. Salama, A. M. Soliman, ―Voltage mode KerwinHuelsman-Newcomb circuit using CDBAs‖, Frequenz, vol.54, pp. 90-93,2000.
S. Özcan, A. Toker, C. Acar, H. Kuntman, O. Çiçekoğlu, ―Single resistance controlled sinusoidal oscillators employing current differencing buffered amplifier‖, Microelec J, vol.31, pp.169-174,2000.
A. Toker, S. Ozoguz, C. Acar, ―CDBA-based fullyintegrated gyrator circuit suitable for electronically tunable inductance simulation‖, Int. J. of Electronics (AEÜ), vol.54,pp.293-296,2000.
O. Çıçekoğlu, H. Kuntman, S. Berk, ―Allpass Filters using a single current conveyor‖, Int J of Electronics, vol.86, pp.947-955, 1999.
A. Toker, S. Özcan, H. Kuntman, O. Çiçekoğlu, ―Supplementary all-pass sections with reduced number of passive elements using a single current conveyor‖, Int J of Electronics, vol.88, pp.969-976,2001.
U. Çam, O. Çiçekoğlu, M. Gülsoy, H. Kuntman, ―New voltage and current mode first-order all-pass filters using single FTFN‖, Frequenz, vol.7-8, pp.177-179,2000.
R. Schauman, M. E. Valkenburg, ―Design of analog filters‖, Oxford University Press, New York, 2001.