Triple-input Single-output Voltage-mode Multifunction Filter Using Only Two Current Conveyors

A new voltage-mode triple-input single-output multifunction filter using only two current conveyors is presented. The proposed filter which possesses three inputs and single-output can generate all biquadratic filtering functions at the output terminal by selecting different input signal combinations. The validity of the proposed filter is verified through PSPICE simulations.




References:
[1] B. Wilson, "Recent developments in current mode
circuits", IEE Proc. Pt G, 137, pp. 63-67, 1990.
[2] U. Kumar and S. K. Shukla, "Recent developments in
current conveyors and their applications", IEE Proc. G., vol.
16, pp. 47-52, 1985.
[3] D.C. Wandsworth, "Accurate current conveyor integrated
circuits", Electronics Letters, vol. 25, no. 18, pp. 1251-1252,
1989.
[4] C. M. Chang, "Universal active current filter with three
inputs and one output using plus type CCIIs", Electronics
Letters, vol. 33, no. 14, pp. 1207-1208, 1997.
[5] C. M. Chang and S. H. TU, "Universal voltage-mode filter
with four inputs and one output using two CCII+s",
International Journal of Electronics, vol. 86, no. 3, pp. 305-
309, 1999.
[6] J.W. Horng, C. G. Tsai, and M. H. Lee, "Novel universal
voltage-mode biquad filter with three inputs and one output
using only two current conveyors", International Journal of
Electronics, vol. 80, pp. 543- 546, 1996.
[7] J. W. Horng, M. H. Lee, H. C. Cheng, and C. W. Chang,
"New CCII based voltage-mode universal biquadratic filter",
International Journal of Electronics, vol. 82, pp. 151-155,
1997.
[8] S. I. Liu, and J. L. Lee, "Voltage-mode universal filters
using two current conveyors", International Journal of
Electronics, vol. 82, pp. 145-149, 1997.
[9] S. Ozoguz and E. O. Gunes "Universal filter with three
inputs using CCII", Electronic Letters, vol. 32, pp. 2134-
2135, 1996.
[10] J. W. Horng, "High-input impedance voltage mode
universal biquadratic filter using three plus type CCIIs", IEEE
Trans. on Circuits and Systems, vol. 48, no. 10, pp. 996-997,
2001.
[11] K. C. Smith and A. Sedra, "A second generation crrent
conveyor and its applications", IEEE Trans. Circuit Theory,
vol. CT-17, pp. 132-134, 1970.