A State Variable Method for the Realization of Universal Current-Mode Biquads
Raj Senani, Kasim Karam Abdalla, Data Ram Bhaskar
DOI: 10.4236/cs.2011.24040   PDF    HTML     4,403 Downloads   8,665 Views   Citations


A state variable method of converting single-resistance-controlled- oscillators (SRCO), into universal current-mode biquad (offering realizations of all the five standard filter functions namely, low pass, band pass, high pass, notch and all pass) has been highlighted. The workability of the exemplary implementation of the derived current-mode universal biquad has been demonstrated by PSPICE simulation results based upon 0.35 μ m technology. It is expected that the proposed method can be applied to other SRCOs to generate other multifunction filter structures.

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R. Senani, K. Abdalla and D. Bhaskar, "A State Variable Method for the Realization of Universal Current-Mode Biquads," Circuits and Systems, Vol. 2 No. 4, 2011, pp. 286-292. doi: 10.4236/cs.2011.24040.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] A. A. El-Adawy, A. M. Soliman and H. O. Elwan, “A Novel Fully Differential Current Conveyor and Its Ap-plications for Analog VLSI,” IEEE Transactions on Cir-cuits and Systems II: Analog and Digital Signal Processing, Vol. 47, No. 4, April 2000, pp. 306-313. doi:10.1109/82.839666
[2] C. M. Chang, B. M. Al-Hashimi, H. P. Chen, S. H. Tu and J. A. Wan, “Cur-rent Mode Single Resistance Controlled Oscillators Using Only Grounded Passive Elements,” Electronics Letters, Vol. 38, No. 39, 2002, pp. 1071-1072. doi:10.1049/el:20020714
[3] H. P. Chen, “Single FDCCII-Based Universal Voltage-Mode Filter,” Interna-tional Journal of Electronics and Commun (AEU), Vol. 63, No. 9, 2009, pp. 713-719. doi:10.1016/j.aeue.2008.05.012
[4] F. Gür and F. An-day, “First-Order Allpass Sections- Based High-Input Low-Output Impedance Voltage-Mode Universal Filter Using FDCCIIs,” Proceeding of European Conference on Circuit Theory and Design, 2007, pp. 428-431.
[5] C. M. Chang and H. P. Chen, “Single FDCCII-Based Tuna-ble Universal Voltage-Mode Filter,” Circuits Systems Signal Processing, Vol. 24, No. 2, 2005, pp. 221-227. doi:10.1007/s00034-004-0422-7
[6] C. M. Chang, B. M. Al-Hashimi, C. L. Wang and C. W. Hung, “Single Fully Differential Current Conveyor Biquad Filters,” IEE Pro-ceeding of Circuits Devices System, Vol. 150, No. 5, 2003, pp. 394-398. doi:10.1049/ip-cds:20030468
[7] S. A. Mahmoud, M. A. Hashiesh and A. M. Soliman, “Low-Voltage Digitally Controlled Fully Differential Current Conveyor,” IEEE Transactions on Circuits and Systems I, Vol. 52, No. 10, 2005, pp. 2055-2064. doi:10.1109/TCSI.2005.852922
[8] H. A. Alzaher, “CMOS Highly Linear Fully Differential Current Con-veyor,” Electronics Letters, Vol. 40, No. 4, 2004, pp. 214-216. doi:10.1049/el:20040183
[9] F. Gür and F. Anday, “Simulation a Novel Current-Mode Universal Filter Using FDCCIIs,” Analog Integrated Circuits and Signal Processing, Vol. 60, 2009, pp. 231-236. doi:10.1007/s10470-009-9293-y
[10] C. N. Lee and C. M. Chang, “Single FDCCII-Based Mixed-Mode Biquad Filter with Eight Outputs,” International Journal of Elec-tronics and Communication (AEU), Vol. 63, No. 9, 2009, pp. 736-742. doi:10.1016/j.aeue.2008.06.015
[11] R. Senani and A. K. Singh, “A New Universal Current-Mode Biquad Filter,” Frequenz, Vol. 56, 2002, pp. 55-59.
[12] R. Senani, A. K. Singh and V. K. Singh, “New Tunable SIMO-Type Cur-rent-Mode Universal Biquad Using Only Three MOCCs and All Grounded Passive Elements,” Frequenz, Vol. 57, 2003, pp. 160-161.
[13] J. W. Horng, “Current Conveyor Based Current-Mode Universal Biquadratic Filter,” Journal of the Chinese Institute of Electrical Engineering, Vol. 9, 2002, pp. 147-150.
[14] H. Y. Wang and C. T. Lee, “Versatile Insensitive Current Mode Universal Bi-quad Implementation Using Current Conveyors,” IEEE Transactions CAS-II. Analog and Digital Signal Processing, Vol. 48, 2001, pp. 409-413.
[15] M. Siri-pruchyanun and W. Jaikla, “Cascadable Current-Mode Biquad Filter and Quadrature Oscillator Using DO-CCCIIs and OTA,” Circuits Systems and Signal Processing, Vol. 28, No. 1, 2009, pp. 99-110. doi:10.1007/s00034-008-9072-5
[16] E. Yuce and S. Minaei, “Universal Current-Mode Filters and Parasitic Impedance Effects on the Filter Performances,” Interna-tional Journal of Circuit Theory and Applications, Vol. 36, No. 2, 2008, pp. 161-171. doi:10.1002/cta.418
[17] S. Minaei, “Electronically Tunable Current-Mode Universal Biquad Filter Using Dual-X Current Conveyors,” Journal of Circuits, Systems, and Computers, Vol. 18, No. 4, 2009, pp. 665-680. doi:10.1142/S0218126609005186
[18] C.-M. Chang, B. M. Al-Hashimi and J. N. Ross, “Unified Active Filter. Biquad Structures,” IEE Proceeding of Circuits Devices System, Vol. 151, No. 4, 2004, pp. 273-277. doi:10.1049/ip-cds:20040132
[19] R. Senani, “New Universal Current Mode Biquad Employing All Grounded Passive Components But Only Two DOCCs,” Journal of Active and Passive Electronic Devices, Vol. 1, 2006, pp. 281-288.
[20] R. Senani, “A Simple Approach of Deriving Single-Input-Multiple-Output Current Mode Biquad Filters,” Frequenz, Vol. 50, No. 5-6, 1996, pp. 124-127.

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