DVCC Based K.H.N. Biquadratic Analog Filter with Digitally Controlled Variations

Bilal Arif^1, , Mohd. Usama Ismail¹ and Ale Imran¹

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

Cite this paper

Bilal Arif, Mohd. Usama Ismail and Ale Imran. DVCC Based K.H.N. Biquadratic Analog Filter with Digitally Controlled Variations. American Journal of Electrical and Electronic Engineering. 2014; 2(6):159-164. doi: 10.12691/AJEEE-2-6-1

Abstract

In this paper, a digitally controlled single input multi output current-mode K.H.N. Biquad Filter is presented. The filter circuit is composed of three DVCCs together with four grounded resistors and two grounded capacitors. The digital control is incorporated using a current-summing network (CSN). Tuning of resonant frequency is carried out by 3–bit digital control word. Block by block replacement has been done to observe the change in the relationship between resonant frequency of the band-pass filter with the control word. The filter circuit showed three different variations when the DVCC blocks were replaced (one by one) with 3-bit DC-DVCC blocks. PSPICE simulations using TSMC 0.25 micron CMOS technology have been performed to validate the theoretical results.

Keywords

Current-mode, Differential Voltage Current Conveyor (DVCC), multifunctional filter, digitally controlled DVCC (DC-DVCC), Cut off frequency, K.H.N. Biquad filter

Copyright

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. O. Elwan, A. M. Soliman. “A novel CMOS current conveyor realization with an electronically tunable current mode filter suitable for VLSI.” Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions, vol. 43, issue. 9, pp. 663-670, Sep. 1996.
[2]	C.M. Chang, M.J. Lee. “Voltage-mode multifunction filter with single input and three outputs using two compound current conveyors.” Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions, vol. 46, issue. 11, pp. 1364-1365, Nov. 1999.
[3]	O. Cicekoglu. “Current-mode biquad with a minimum number of passive elements.” Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions, vol. 48, issue. 2, pp. 221-222, Feb. 2001.
[4]	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.
[5]	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.
[6]	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.
[7]	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.
[8]	T. Dostal, D. Biolek, K. Vrba. “Adjoint voltage-current mode transformation for circuits based on modern current conveyors.” Devices, Circuits and Systems, Proceedings of the Fourth IEEE International Caracas Conference, 2002, pp. T034-1.
[9]	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.
[10]	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.
[11]	H. P. Chen and S. S. Shen. “A versatile universal capacitor-grounded voltage-mode filter using DVCCs.” ETRI journal, vol. 29, issue. 4, pp. 470-476, Aug. 2007.
[12]	H. P. Chen. “Tunable versatile current-mode universal filter based on plus-type DVCCs.” AEU-International Journal of Electronics and Communications, vol. 66, issue. 4, pp. 332-339, 2012.
[13]	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.
[14]	M.A. Ibrahim, S. Minaei, H. Kuntman. “A 22.5 MHz current-mode KHN biquad using differential voltage current conveyor and grounded passive elements.” AEU-International Journal of Electronics and Communications, vol. 59, issue. 5, pp. 311-318, 2005.
[15]	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.
[16]	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.