Electronically Tunable Multifunction Current Mode Filter Employing Grounded Capacitors

Rani Fathima, Sridevi Ponmalar Perumal, Vadivel Muniyappan, Mohammad Faseehuddin, Worapong Tangsrirat


This paper presents, a new single input multi output (SIMO) filter that works in current mode (CM). The universal filter is designed using a recently proposed highly versatile active building block the extra X current conveyor transconductance amplifier (EXCCTA). The design employs two EXCCTAs, two capacitors and one resistor. The designed filter uses grounded passive elements which is advantageous for fabrication. The design can provide all the five responses i.e., high-pass (HP), band-pass (BP), lowpass (LP), all-pass (AP), and band-stop (BS) simultaneously. In addition, it provides an independent electronic tunability of angular frequency (ω) and quality factor (Q). Moreover, there is no requirement of passive component matching. The non-ideal and sensitivity analysis of the filter is done to get a measure of the effect of the process and components variation on the functioning of the filter. The simulation results are obtained using Cadence software employing 0.18 µm CMOS technology parameters from Silterra Malaysia at a supply voltage of ±1.25V also the layout of the EXCCTA is designed. The proposed filter is validated by designing it for a frequency of 16.07MHz. Additionally, the Spice macro model of the commercially available integrated circuits (ICs) AD844 and LM13700 are used to further test the feasibility of the proposed filter.


current mode, filter, current conveyor, universal filter, analog

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R. Senani, D. Bhaskar, and A. Singh, Current conveyors: variants, applications and hardware implementations vol. 560: Springer, 2015. https://doi.org/10.1007/978-3-319-08684-2.

J.-W. Horng and Z.-Y. Jhao, "Voltage-mode universal biquadratic filter using single DVCC," International Scholarly Research Notices, vol. 2013, 2013. https://doi.org/10.1155/2013/125746.

P. A. Mohan, Current-mode VLSI analog filters: design and applications: Springer Science & Business Media, 2003. https://doi.org/10.1007/978-1-4612-0033-8.

A. M. Soliman, "Current-mode universal filters using current conveyors: classification and review," Circuits, Systems & Signal Processing, vol. 27, pp. 405-427, 2008. https://doi.org/10.1007/s00034-008-9034-y.

S. V. Singh, S. Maheshwari, and D. Chauhan, "Current-processing current-controlled universal biquad filter," Radioengineering, vol. 21, pp. 317-323, 2012. https://doi.org/10.1007/s00034-008-9034-y.

H.-P. Chen, "Versatile current-mode universal biquadratic filter using DO-CCIIs," International journal of electronics, vol. 100, pp. 1010-1031, 2013. https://doi.org/10.1080/00207217.2012.731370.

H. P. Chen, "Current‐mode dual‐output ICCII‐based tunable universal biquadratic filter with low‐input and high‐output impedances," International Journal of Circuit Theory and Applications, vol. 42, pp. 376-393, 2014. https://doi.org/10.1002/cta.1858.

M. A. Ibrahim, S. Minaei, and 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, pp. 311-318, 2005. https://doi.org/10.1016/j.aeue.2004.11.027.

N. Herencsar, J. Koton, and K. Vrba, "Single CCTA-Based Universal BiquadraticFilters Employing Minimum Components," International Journal of Computer and Electrical Engineering, vol. 1, p. 307, 2009. DOI: 10.7763/IJCEE.2009.V1.48.

E. Yuce, B. Metin, and O. Cicekoglu, "Current-mode biquadratic filters using single CCIII and minimum number of passive elements," Frequenz, vol. 58, pp. 225-227, 2004. https://doi.org/10.1515/FREQ.2004.58.9-10.225.

W. Tangsrirat, "Single-input three-output electronically tunable universal current-mode filter using current follower transconductance amplifiers," AEU-International Journal of Electronics and Communications, vol. 65, pp. 783-787, 2011. https://doi.org/10.1016/j.aeue.2011.01.002.

J.-W. Horng, "Current-mode and transimpedance-mode universal biquadratic filter using multiple outputs CCIIs," 2010.

K. K. Abdalla, D. R. Bhaskar, and R. Senani, "Configuration for realising a current-mode universal filter and dual-mode quadrature single resistor controlled oscillator," IET circuits, devices & systems, vol. 6, pp. 159-167, 2012. DOI: 10.1049/iet-cds.2011.0160.

A. Qadir and T. Altaf, "Current mode canonic OTA-C universal filter with single input and multiple outputs," in 2010 2nd International Conference on Electronic Computer Technology, 2010, pp. 32-34. DOI: 10.1109/ICECTECH.2010.5479995.

J. Satansup and W. Tangsrirat, "Single-input five-output electronically tunable current-mode biquad consisting of only ZC-CFTAs and grounded capacitors," Radioengineering, vol. 20, pp. 650-655, 2011.

D. Biolek, V. Biolkova, Z. Kolka, and J. Bajer, "Single-input multi-output resistorless current-mode biquad," in 2009 European Conference on Circuit Theory and Design, 2009, pp. 225-228. DOI: 10.1109/ECCTD.2009.5274928.

R. Senani and A. Singh, "A new universal current-mode biquad filter," Frequenz, vol. 56, pp. 55-59, 2002. https://doi.org/10.1515/FREQ.2002.56.1-2.55.

M. Gupta, P. Dogra, and T. S. Arora, "Novel current mode universal filter and dual-mode quadrature oscillator using VDCC and all grounded passive elements," Australian Journal of Electrical and Electronics Engineering, vol. 16, pp. 220-236, 2019. https://doi.org/10.1080/1448837X.2019.1648134.

M. Sagbas and M. Koksal, "Current-mode state-variable filter," Frequenz, vol. 62, pp. 37-42, 2008. https://doi.org/10.1515/FREQ.2008.62.1-2.37.

J. Jerabek, R. Sotner, and K. Vrba, "Comparison of the SITO current-mode universal filters using multiple-output current followers," in 2012 35th International Conference on Telecommunications and Signal Processing (TSP), 2012, pp. 406-410. DOI: 10.1109/TSP.2012.6256325.

R. Singh and D. Prasad, "Electronically Tunable SIMO type Mixed-mode Biquadratic Filter using Single FTFNTA," Indian Journal of Pure & Applied Physics (IJPAP), vol. 59, pp. 629-637, 2021.

L. Safari, G. Barile, G. Ferri, and V. Stornelli, "A new low-voltage low-power dual-mode VCII-based SIMO universal filter," Electronics, vol. 8, p. 765, 2019. https://doi.org/10.3390/electronics8070765.

A. Abaci and E. Yuce, "A new DVCC+ based second-order current-mode universal filter consisting of only grounded capacitors," Journal of Circuits, Systems and Computers, vol. 26, p. 1750130, 2017. https://doi.org/10.1142/S0218126617501304.

T. Parveen, "OFC based high output impedance current mode simo universal biquadratic filter," in 2011 International Conference on Multimedia, Signal Processing and Communication Technologies, 2011, pp. 134-136. DOI: 10.1109/MSPCT.2011.6150456.

A. Kumar, A. K. Kushwaha, and N. Chander, "Current-mode SIMO universal filter realization using dual-X multi output current conveyor," in TENCON 2019-2019 IEEE Region 10 Conference (TENCON), 2019, pp. 2179-2183. DOI: 10.1109/TENCON.2019.8929631.

S. Roy, T. K. Paul, S. Maiti, and R. R. Pal, "Voltage Differencing Current Conveyor Based Voltage-Mode and Current-Mode Universal Biquad Filters with Electronic Tuning Facility," International Journal of Engineering and Technology Innovation, vol. 11, p. 146, 2021. DOI: https://doi.org/10.46604/ijeti.2021.6821.

M. Faseehuddin, J. Sampe, S. Shireen, and S. H. M. Ali, "Lossy and lossless inductance simulators and universal filters employing a new versatile active block," Informacije MIDEM, vol. 48, pp. 97-114, 2018.

S. Singh, R. Tomar, and D. Chauhan, "A new current tunable current input current output biquad using CFTAs," Journal of Engineering Science and Technology, vol. 12, pp. 2268-2282, 2017.

A. Kumar and S. K. Paul, "DX-MOCCII based fully cascadable second order current-mode universal filter," Journal of Circuits, Systems and Computers, vol. 27, p. 1850113, 2018. https://doi.org/10.1142/S021812661850113X.

T. Ettaghzouti, N. Hassen, K. Garradhi, and K. Besbes, "SIMO high frequency active universal current mode filter with independent control of pole frequency and quality factor," in 2017 18th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA), 2017, pp. 157-162. DOI: 10.1109/STA.2017.8314934.

S. Maheshwari, "Current conveyor all-pass sections: brief review and novel solution," The Scientific World Journal, vol. 2013, 2013. https://doi.org/10.1155/2013/429391.

DOI: https://doi.org/10.33180/InfMIDEM2022.401


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