Digitally Reconfigurable Two DVCC Based Biquadratic Analog Filter

Mohd. Usama Ismail^1, , Bilal Arif¹ and Ale Imran¹

¹Department of Electronics Engineering, Aligarh Muslim University, Aligarh, India

Cite this paper:
Mohd. Usama Ismail, Bilal Arif and Ale Imran. Digitally Reconfigurable Two DVCC Based Biquadratic Analog Filter. International Transaction of Electrical and Computer Engineers System. 2014; 2(5):135-143. doi: 10.12691/iteces-2-5-2

Abstract

In this paper, a digitally reconfigurable Multi Input Single Output (MISO) voltage mode multifunctional biquadratic analog filter has been presented. The circuit has three input terminals and one output terminal. It employs two Differential Voltage Current Conveyor blocks (DVCC), two capacitors and two resistors. Filter responses like low-pass, band-pass, high-pass and band-reject can be obtained from the same topology by applying voltages to different input terminals. The digital re-configurability is obtained using a current-summing network (CSN). Cut-off frequency of the various filter responses is controlled and varied with the help of a 3–bit digital control word. Further quality factor is also controlled with the 3-bit control word. PSPICE simulations using TSMC 0.25μCMOS technology have been performed to validate the theoretically predicted results.

Keywords:
Voltage-mode Differential Voltage Current Conveyor (DVCC) analog filter digitally reconfigurable circuits cut off frequency quality factor second-generation current conveyor biquadratic filter

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References:

[1]	H. Y. Wang, C. T. Lee. “Versatile insensitive current-mode universal biquad implementation using current conveyors.” Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions, vol. 48, issue. 4, pp. 409-413, Apr. 2001.
[2]	H. Hakan Kuntman. “New Advances and Possibilities in Active Circuit Design.” in Proc. 10th International Conference on Development and Application Systems, 2010, pp. 9-18.
[3]	B. Wilson, “Recent developments in current conveyors and current-mode circuits.” Circuits, Devices and Systems, IEE Proceedings G, vol. 137, issue. 2, pp. 63-77, Apr. 1990.
[4]	A.S. Sedra, K.C. Smith. “A second generation current conveyor and its applications”. IEEE Transactions on circuit theory, vol. 17, pp. 132-134, Feb. 1970.
[5]	W. Chiu, S. I. Liu, H. W. Tsao, J. J. Chen. “CMOS differential difference current conveyors and their applications.” IEE Proceedings-Circuits, Devices and Systems, vol. 143, issue. 2, pp. 91-96, Apr. 1996.
[6]	H.O. Elwan, A. M. Soliman. “Novel CMOS differential voltage current conveyor and its applications.” IEE Proceedings-Circuits, Devices and Systems, vol. 144, issue. 3, pp. 195-200, Jun. 1997.
[7]	J.W. Horng, "DVCCs based high input impedance voltage-mode first-order allpass, highpass and lowpass filters employing grounded capacitor and resistor." Radioengineering, vol. 19, issue. 4, pp. 653-656, Dec. 2010.
[8]	H.P. Chen, K.W. Huang, and P.M. Huang. "DVCC-Based first-order filter with grounded capacitor." International Journal of Information and Electronics Engineering, vol. 2, issue. 1, pp. 50-54, Jan. 2012
[9]	I.A. Khan and A.M. Nahhas. "Reconfigurable Voltage Mode First Order Multifunctional Filter using Single Low Voltage Digitally Controlled CMOS CCII." International Journal of Computer Applications, vol. 45, issue. 5, pp. 37-40, May 2012.
[10]	J. W. Horng, M. H. Lee, H. C. Cheng, C. W. Chang. "New CCII-based voltage-mode universal biquadratic filter." International Journal of Electronics, vol. 82, issue. 2, pp. 151-156, 1997.
[11]	W. Tangsrirat, O. Chaannumsin. “Voltage -mode multifunctional biquadratic filter using single DVCC and minimum number of passive elements”. Indian Journal of Pure and Applied Physics, vol. 49, pp. 703-707, Oct. 2011.
[12]	S. A. Mahmoud, M.A. Hashiesh. and A.M. Soliman. “Low-voltage digitally controlled fully differential current conveyor.” Circuits and Systems I: Regular Papers, IEEE Transactions, VOL. 52, issue. 10, pp. 2055-2064, Oct. 2005.