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Third Order Current Mode Universal Filter Using Only Op.amp. and OTAs

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DOI: 10.4236/cs.2010.12011    5,111 Downloads   8,498 Views   Citations

ABSTRACT

A novel current mode active-only universal filter using four dual current output Operational Transconductance Amplifiers (OTAs) and three Operational Amplifiers (OAs) is presented. The circuit can realize low pass and high pass filter characteristics by choosing the suitable current output branches. The filter performance factors natural frequency (ω0), bandwidth , quality factor Q and transconductance gain gm are electronically tunable. The proposed circuit has very low sensitivities with respect to circuit active elements. From sensitivity analysis, it has been clearly shown that the proposed circuit has very low sensitivities with respect to the circuit active elements. The gain roll-off of high pass and low pass configuration is 18 dB/oc- tave. The proposed circuit facilitates integrability, programmability and ease of implementation.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

G. Shinde and D. Mulajkar, "Third Order Current Mode Universal Filter Using Only Op.amp. and OTAs," Circuits and Systems, Vol. 1 No. 2, 2010, pp. 65-70. doi: 10.4236/cs.2010.12011.

References

[1] T. Tsutani, T. Higashimura, Y. Sumi and Y. Fukui, “Electonically Tunable current mode active only biquadratic filter,” International Journal of Electronics, Vol. 87, No. 3, 2000, pp. 307-314.
[2] C.-C. Hsu and W.-S. Feng, “Dynamic Decoupling and Compensating Methods of Multi-Axis Force Sensors,” International Journal of Electronics, Vol. 88, No. 1, 2001, pp. 41-51
[3] I. A. Khan and M. H. Zaidi, “Multifunction Translinear-C Current – Mode Filter,” International Journal of Electonics, Vol. 87, No. 9, 2000, pp. 1047-1051.
[4] M. Higashimura, “Current Mode Low Pass and Band Pass Filters Using the Operational Amplifier Pole,” International Journal of Electronics, Vol. 74, No. 6, 1993, pp. 945-949.
[5] T. M. Ishida, Y. Fukui and S. Tsuiki, “Novel Electronically Tunable Current Mode Filter without External Passive Elements,” IEEE, Vol. 1, 1996, pp. 262-265.
[6] G. W. Roberts and A. S. Sedra, “A General Class of Current Amplifier Based Biquadratic Filter Circuits,” IEEE Transactions on Circuits and Systems, Vol. 39, No. 4, 1992, pp. 257-263.
[7] J. Ramirez-Angulo, M. Robinson and E. Sanchez-Sinen- cio, “current mode continuous time filters two design approaches,” IEEE Transactions on Circuits and Systems, Vol. 39, No. 6, 1992, pp. 337-341.
[8] N. A. Shah, M. F. Rather, M. A. Malik and S. Z. Iqbal, “Cascadable Electronically Tunable Sito Current Mode Active Only Universal Filter,” ETRI Journal, Vol. 26, 2004, pp. 295-300.
[9] A. K. Mitra and V. K. Aatre, “Low Sensitivity High- Frequency Active R Filters,” I.E.E.E. Transactions on Circuits and Systems, Vol. 23, No. 11, 1976, pp. 670- 676.
[10] G. N. Shinde and P. B. Patil, “Sadhana,” Journal of Engineering Science, Vol. 28, No. 6, 2003, pp. 1919-1926.
[11] T. Tsukutani, M. Higashimura, Y. Sumi and Y. Fukui, “Novel Voltage-Mode Biquad Using Only Active Devices,” International Journal of Electronics, Vol. l87, No. 3, 2000, pp. 307-314
[12] R. Nandi “Active R Realization of Bilinear RL Impedances and their Applications in a High-Q Parallel Resonator and External Oscillator,” Proceeding of the Institute of Electrical and Electronics Engineering, Vol. 66, No. 12, 1978, pp. 1666-1668.
[13] G. N. Shinde and D. D. Mulajkar, “Electronically Tunable Current-Mode Second Order High Pass Filter for Different Value of Q,” International Journal of Physical Sciences, Vol. 3, No. 6, 2008, pp. 148-151.
[14] D. R. Bhaskar, U. R. Sharma, S. M. I. Rizvi, “New Current-Mode Universal Biquadratic Filter,” Microelectronic Journal, Vol. 88, No. 10, 1999, pp. 837-839.
[15] S. Minaei and S. Turkoz, “Current-Mode Electronically Tunable Universal Filter Using Only Plus-Type Current Controlled Conveyors and Grounded Capacitors, Bandpass High Pass Filter,” ETRL Journal, Vol. 26, No. 4, 2004, pp. 292-296.

  
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