Dual DVCC Based Voltage-Mode Digitally Programmable Biquadratic Filter

Ale Imran, Deepesh Arora, Rishabh Kumar

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

DOI: 10.4236/cs.2014.51001                

Abstract

The recent advances in IC technology have led to the trend of designing hybrid systems to benefit both analog and the digital domain. Among analog circuits, multifunctional filter along with multiphase oscillator constitutes a building block of critical importance. In this paper, a digitally reconfigurable multi-input-multi-output voltage mode multifunctional biquadratic filter has been presented. The circuit comprises of two differential voltage current conveyors (DVCCs), two grounded capacitors and two floating resistors. The digital controllability is incorporated using a current-summing network (CSN). Tunability of quality factor is achieved by the use of a 3-bit digital control word while keeping the resonant frequency constant. PSPICE simulations using TSMC 0.25 μm CMOS technology have been performed to validate the theoretically predicted results.

Keywords

Voltage-Mode; Differential Voltage Current Conveyor (DVCC); Multifunctional Filter; Digitally Controlled Circuits; Current Summing Network

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	B. Wilson, “Recent Developments in Current Conveyors and Current-Mode Circuits,” IEE Proceedings Pt. G, Vol. 137, 1990, pp. 63-77.
[2]	A. Sedra and K. C. Smith, “A Second Generation Current Conveyor and Its Applications,” IEEE Transactions, Vol. CT-17, 1970, pp. 132-134.
[3]	A. M. Soliman, “Low Voltage Wide Range CMOS Differential Voltage Current Conveyor and Its Applications,” Contemporary Engineering Sciences, Vol. 1, No. 3, 2008, p. 105.
[4]	H. O. Elwan and A. M. Soliman, “Novel CMOS Differential Voltage Current Conveyor and Its Application,” IEEE Proceedings of Circuits Devices System, Vol. 144, 1997, pp. 195-200.
[5]	H. Sedef and C. Acar, “A New Floating Inductor Circuit Using Differential Voltage Current Conveyors,” Frequenz, Vol. 54, No. 5-6, 2000, pp. 123-125. http://dx.doi.org/10.1515/FREQ.2000.54.5-6.123
[6]	H. Sedef and C. Acar, “A New Floating FDNR Circuit Using Differential Voltage Current Conveyors,” International Journal of Electronics and Communications, AEü, Vol. 54, 2000, pp. 297-301.
[7]	S. S. Gupta and R. Senani, “Grounded Capacitor Current Mode SRCO, Novel Application of DVCCC,” Electronics Letters, Vol. 36, No. 3, 2000, pp. 195-196. http://dx.doi.org/10.1049/el:20000240
[8]	T. Dostal, D. Biolek and K. Vrba, “Adjoint Voltage Current Mode Transformation for Circuits Based on Modern Current Conveyors,” Fourth IEEE International Caracas Conference on Devices, Circuits and Systems, Aruba, 17-19 April 2002.
[9]	S. Minaei and C. Temizyürek, “Dual Input All-Pass Filter Using DVCC,” International Symposium on Signals, Circuits & Systems (SCS), Iasi, 10-11 July 2003.
[10]	H. Chen, Y. Lin, W. H. Wu and C. Li, “Versatile DVCCBased Universal Voltage-Mode Biquadratic Filter,” Progress in Electromagnetics Research Symposium Proceedings, Suzhou, 12-16 September 2011.
[11]	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.
[12]	W. Y. Chiu, J. W. Horng, H. Lee and C. C. Huang, “DVCCBased Voltage-Mode Biquadratic Filter with High-Input Impedance,” 5th IEEE International Symposium on Electronic Design, Test & Applications, Ho Chi Minh, 13-15 January 2010, pp. 121-125.
[13]	S. Minaei and E. Yuce, “All-Grounded Passive Elements Voltage-Mode DVCC-Based Universal Filters,” Circuit, Systems, and Signal Processing, Vol. 29, No. 2, 2010, p. 295.
[14]	H. P. Chen and S. S. Shen, “A Versatile Universal Capacitors-Grounded Voltage-Mode Filter Using DVCCs,” Electronics and Telecommunications Research Institute Journal (ETRI), Vol. 29, No. 4, 2007, pp. 470-475.
[15]	T. Tsukutani, Y. Sumi and N. Yabuki, “Novel Currentmode Biquadratic Circuit Using Only Plus Type DODVCCs and Grounded Passive Components,” International Journal of Electronics, Vol. 94, No. 12, 2007, pp. 1137-1146. http://dx.doi.org/10.1080/00207210701791085