CS  Vol.2 No.3 , July 2011
Electronically Tunable Minimum Component Biquadratic Filters for Interface Circuits
Author(s) Mehmet Sağbaş
ABSTRACT
In this paper, two new electronically tunable filter configurations are proposed. The proposed filters operate current-mode (CM), voltage-mode (VM), transimpedance-mode (TIM) and transadmittance-mode (TAM). The first configuration realizes second-order VM band-pass and TAM high-pass filter characteristics from the same configuration. The second one realizes second-order TIM band-pass and CM low-pass filter characteristics from the same configuration. They also use minimum number of electronic components (two capacitors and one active component namely; current controlled current difference transconductance amplifier). The workability of the proposed structures has been demonstrated by simulation results.

Cite this paper
nullM. Sağbaş, "Electronically Tunable Minimum Component Biquadratic Filters for Interface Circuits," Circuits and Systems, Vol. 2 No. 3, 2011, pp. 237-241. doi: 10.4236/cs.2011.23033.
References
[1]   B. Wilson, “Recent Developments in Current Conveyors and Current-Mode Circuits,” IEE Proceedings of Circuits, Devices and Systems, Vol. 137, No. 2, 1990, pp. 63-77.

[2]   D. C. Wandsworth, “Accurate Current Conveyor Integrated Circuits,” Electronics Letters, Vol. 25, No. 18, 1989, p. 1251. doi:10.1049/el:19890839

[3]   G. Gilbert, “Current Mode, Voltage Mode, or Free Mode? A Few Sage Suggestions,” Analog Integrated Circuits and Signal Processing, Vol. 38, No. 2-3, 2004, pp. 83-101. doi:10.1023/B:ALOG.0000011161.44537.da

[4]   G. W. Rundell, J. J. Ou, T. B. Cho, G. Chien, F. Brianti, J. A. Weldon and P. Grey, “A 1.9-Ghz Wide-Band IF Double Conversion CMOS Receiver for Cordless Telephone Applications,” IEEE Journal of Solid-State Circuits, Vol. 32, No. 12, 1997, pp. 2071-2088. doi:10.1109/4.643665

[5]   M. S. Steyaert, J. Janssens, B. D. Muer, M. Borremans and N. Itoh, “A 2-V CMOS Cellular Transceiver Front-End,” IEEE Journal of Solid-State Circuits, Vol. 35, No. 12, 2000, pp. 1895-1907. doi:10.1109/4.890303

[6]   S. Minaei, G. Topcu and O. Cicekoglu, “Low Input Impedance Trans-impedance Type Multifunction Filter Using Only Active Elements,” International Journal of Electronics, Vol. 92, No. 7, 2005, pp. 385-392. doi:10.1080/00207210412331334789

[7]   A. Toker, O. Cicekoglu, S. Ozcan and H. Kuntman, “High-Output-Impedance Transadmittance Type Continuous-Time Multifunction Filter with Minimum Active Elements,” International Journal of Electronics, Vol. 88, No. 10, 2001, pp. 1085-1091. doi:10.1080/00207210110071260

[8]   U. Cam, “A New Transadmittance Type First-Order Allpass Filter Employing Single Third Generation Current Conveyor,” Analog Integrated Circuits and Signal Proc- essing, Vol. 43, No. 1, 2005, pp. 97-99. doi:10.1007/s10470-005-6576-9

[9]   N. A. Shah, S. Z. Iqbal and B. Parveen, “SITO High Output Impedance Transadmittance Filter Using FTFNs,” Analog Integrated Circuits and Signal Processing, Vol. 40, No. 1, 2004, pp. 87-89. doi:10.1023/B:ALOG.0000031438.72455.b1

[10]   U. Cam, C. Cakir and O. Cicekoglu, “Novel Transimpedance Type First-Order All-Pass Filter Using Single OTRA,” International Journal of Electronics and Communication, Vol. 58, No. 4, 2004, pp. 296-298. doi:10.1078/1434-8411-54100246

[11]   M. Sagbas and M. Koksal, “Voltage-Mode Three-Input Single-Output Multifunction Filters Employing Minimum Number of Components,” Frequenz, Vol. 61, No. 3-4, 2007, pp. 87-93. doi:10.1515/FREQ.2007.61.3-4.87

[12]   M. Sagbas and M. Koksal, “Current-Mode State-Variable Filter,” Frequenz, Vol. 62, No. 1-2, 2008, pp. 37-42. doi:10.1515/FREQ.2008.62.1-2.37

[13]   A. U. Keskin, “Voltage-Mode High-Q Band-Pass Filters and Oscillators Employing Single CDBA and Minimum Number of Components,” International Journal of Electronics, Vol. 92, No. 8, 2005, pp. 479-487. doi:10.1080/00207210500168626

[14]   U. Cam, “A Novel Current-Mode Second-Order Notch Filter Configuration Employing Single CDBA and Reduced Number of Passive Components,” Computers and Electrical Engineering, Vol. 30, No. 2, 2004, pp. 147-151. doi:10.1016/S0045-7906(03)00002-8

[15]   S. ?zcan, H. Kuntman and O. Cicekoglu, “Multi-input Single-Output Filter with Reduced Number of Passive Elements Using Single Current Conveyor,” Computers and Electrical Engineering, Vol. 29, No. 1, 2003, pp. 45-53. doi:10.1016/S0045-7906(01)00024-6

[16]   S. Minaei, O. Cicekoglu, H. Kuntman and S. Turkoz, “High Output ?mpedance Current-Mode Lowpass, Bandpass and Highpass Filters Using Current Controlled Conveyors,” International Journal of Electronics, Vol. 88, No. 8, 2001, pp. 915-922. doi:10.1080/00207210110058166

[17]   S. Maheshwari and I. A. Khan, “Current Controlled Current Differencing Buffered Amplifier: Implementation and Applications,” Active and Passive Electronics Com- ponents, Vol. 4, No. 4, 2004, pp. 219-227. doi:10.1080/08827510310001648924

[18]   M. Koksal and M. Sagbas, “General Synthesis Procedure for nth-Order Current Transfer Function Using CDBA,” Frequenz, Vol. 61, No. 3-4, 2007, pp. 94-101. doi:10.1515/FREQ.2007.61.3-4.94

[19]   M. Koksal, M. Sagbas and H. Sedef, “An Electronically Tunable Oscillator Using a Single Active Device and Two Capacitors,” Vol. 17, No. 5, 2008, pp. 885-891.

[20]   P. Silapan, W. Jaikla and M. Siripruchyanun, “High-Performance BiCMOS Current Controlled CDBA and Appli- cation,” International Symposium on Communication and Information Technology, Vol. 1-3, 2007, pp. 40-43.

[21]   W. Tangsrirat, D. Prasertsom and W. Surakampontorn, “Low-Voltage Digitally Controlled Current Differencing Buffered Amplifier and Its Application,” AEU-International Journal of Electronics and Communications, Vol. 63, No. 4, 2009, pp. 249-258. doi:10.1016/j.aeue.2008.01.006

[22]   D. R. Frey, “Log-Domain Filtering: An Approach to Current-Mode Filtering,” IEE Proceedings-G: Circuits, Devices and Systems, Vol. 140, No. 6, 1993, 406-416. doi:10.1049/ip-g-2.1993.0066

 
 
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