Voltage/Current-Mode Multifunction Filters Using One Current Feedback Amplifier and Grounded Capacitors

Jiun-Wei Horng, Chun-Li Hou, Wei-Shyang Huang, Dun-Yih Yang

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DOI: 10.4236/cs.2011.22010                

Abstract

One configuration for realizing voltage-mode multifunction filters and another configuration for realizing current-mode multifunction filters using current feedback amplifiers (CFAs) are presented. The proposed voltage-mode circuit exhibit simultaneously lowpass and bandpass filters. The proposed current-mode circuit exhibit simultaneously lowpass, bandpass and highpass filters. The proposed circuits offer the following features: no requirements for component matching conditions; low active and passive sensitivities; employing only grounded capacitors and the ability to obtain multifunction filters from the same circuit configuration.

Keywords

Current Feedback Amplifier, Active Filter, Voltage-Mode, Current-Mode

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	S. S. Gupta, D. R. Bhaskar and R. Senani, “New Voltage Con-trolled Oscillators Using CFOAs,” International Journal of Electronics and Communications (AEU), Vol. 63, No. 3, 2009, pp. 209-217. doi:10.1016/j.aeue.2008.01.002
[2]	E. Yuce, “Novel Lossless and Lossy Grounded Inductor Simulators Consisting of a Ca-nonical Number of Components,” Analog Integrated Circuits and Signal Processing, Vol. 59, No. 1, 2009, pp. 77-82. doi:10.1007/s10470-008-9235-0
[3]	R. Nandi, T. K. Ban-dyopadhyay, S. K. Sanyal and S. Das, “Selective Filters and Sinusoidal Oscillators Using CFA Transimpedance Pole,” Cir-cuits, Systems and Signal Processing, Vol. 28, No. 3, 2009, pp. 349-359.
[4]	J. W. Horng, P. Y. Chou and J. Y. Wu, “Vol-tage/Current-Mode Multifunction Filters Using Cur-rent-Feedback Amplifiers and Grounded Capacitors,” Active and Passive Electronic Components, Vol. 2010, 2010, pp. 1-5. doi:10.1155/2010/785631
[5]	K. Kumar and K. Pal, “High Input Impedance Voltage Mode Universal Biquad Filter,” Indian Journal of Pure and Applied Physics, Vol. 48, No. 4, 2010, pp. 292-296.
[6]	N. Nikoloudis and C. Psychalinos, “Multiple Input Single Output Universal Biquad Filter with Current Feedback Operational Amplifiers,” Circuits, Systems and Signal Processing, Vol. 29, No. 6, 2010, pp. 1167-1180. doi:10.1007/s00034-010-9194-4
[7]	A. Fabre, “Gyrator Im-plementation from Commercially Available Transimpedance Operational Amplifiers,” Electronics Letters, Vol. 28, No. 3, 1992, pp. 263-264. doi:10.1049/el:19920162
[8]	A. Fabre, “Insensitive Voltage-Mode and Current-Mode Filters from Commercially Available Transimpedance Opamps,” Proceedings of the Institution of Electrical Engineers, Vol. 140, No. 5, 1993, pp. 319-321.
[9]	S. I. Liu and Y. S. Hwang, “Realisation of R-L and C-D Impedances Using a Current-Feedback Amplifier and Its Applications,” Electronics Letters, Vol. 30, No. 5, 1994, pp. 380-381. doi:10.1049/el:19940286
[10]	A. M. Soliman, “Applications of the Current Feedback Amplifiers,” Analog Integrated Circuits and Signal Processing, Vol. 11, No. 3, 1996, pp. 265-302. doi:10.1007/BF00240490
[11]	A. M. Soliman, “A New Filter Configuration Using Current Feedback Op-Amp,” Microelec-tronics Journal, Vol. 29, No. 7, 1998, pp. 409-419. doi:10.1016/S0026-2692(97)00025-6
[12]	S. I. Liu, “High Input Impedance Filters with Low Component Spread Using Current-Feedback Amplifiers,” Electronics Letters, Vol. 31, No. 13, 1995, pp. 1042-1043. doi:10.1049/el:19950725
[13]	M. Bhushan and R. W. Newcomb, “Grounding of Capacitors in Integrated Circuits,” Electronic Letters, Vol. 3, No. 4, 1967, pp. 148-149. doi:10.1049/el:19670114
[14]	R. Senani, “Realization of a Class of Analog Signal Processing/Signal Generation Circuits: Novel Configurations Using Current Feedback Op-Amps,” Frequenz, Vol. 52, No. 9-10, 1998, pp. 196-206. doi:10.1515/FREQ.1998.52.9-10.196