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CMOS implementations of VDTA based frequency agile filters for encrypted communications

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Abstract

In this study, two different voltage mode frequency agile filters employing voltage differencing trans-conductance amplifier (VDTA) are designed for encrypted communications. The agility of the designed frequency agile filters are supported by only switching transistors instead of feedback systems in the conventional designs. The proposed frequency agile filters are implemented by CMOS technology to benefit from easy and cheaper manufacturing of CMOS circuits. One of the designed frequency agile filter is realized by changing gm (trans-conductance) and the other is realized by varying capacitance. The MOS capacitor technique is used instead of conventional capacitors in the second frequency agile filter structure. The CMOS performance of designed frequency agile filter realized with VDTA is compared with the recently recommended frequency agile filter structure realized with Bi-CMOS technology. The performance parameters of the VDTA and agile filter structures are summarized and the suitability of the filters for different applications are given. The designed filter can be easily operated up to 1 GHz. In this study, HAVEQUICK operating UHF band between 225 and 400 MHz is selected as the essential application of the designed filters. Moreover, proposed structures are laid-out. To prove the performance of the designed frequency agile filters, post-layout simulations with Monte Carlo and corner analyses are performed as well. AMS 0.18 µm parameters are used for the CMOS realization of the designed frequency agile filter.

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References

  1. Lakys, Y., Godara, B., & Fabre, A. (2011). Cognitive and encrypted communications: state of the art and a new approach for frequency agile filters. Turkish Journal of Electrical Engineering & Computer Sciences, 19, 251–273.

    Google Scholar 

  2. Mitola, J. (1995). The software radio architecture. IEEE Communications Magazine, 33(5), 26–38.

    Article  Google Scholar 

  3. Schmid, H. (2002). Why the terms ‘current mode’ and ‘voltage mode’ neither divide nor qualify circuits. IEEE international symposium on circuits and systems, 2002. ISCAS 2002 (Vol. 2, p. II-29, II-32).

  4. Lakys, Y., Godara, B., Fabre, A. (2009). Cognitive and encrypted communications, part 2: a new approach to active frequency—agile filters and validation results for an agile bandpass topology in SiGe-BiCMOS. ELECO’09 Proceedings (pp. 16–29). Bursa. Retrieved November 5–8, 2009.

  5. Youssef, M. I., Emam, A. E., & Abd Elghany, M. (2009). Direct sequence spread spectrum technique with residue number system. International Journal of Electrical, Computer and Systems Engineering, 3(4), 223–230.

    Google Scholar 

  6. Andren, C. (1999). A comparison of frequency hopping and direct sequence spread spectrum modulation for IEEE 802.11 applications at 2.4 GHz. Electronic Engineering Times.

  7. Rackley, S. (2007). Wireless networking technology: from principles to successful implementation. Newnes: Elsevier.

    Google Scholar 

  8. Kaur, K., & Vig, R. (2012). Frequency hopping ad hoc networks: Principles and routing protocols. International Journal of Applied Engineering Research, 7(11), 2012.

    Google Scholar 

  9. http://en.wikipedia.org/wiki/HAVE_QUICK.

  10. http://en.wikipedia.org/wiki/SINCGARS.

  11. Lakys, Y., & Fabre, A. (2013). Multistandard transceivers: state of the art and a new versatile implementation for fully active frequency agile filters. Analog Integrated Circuits and Signal Processing, 74(1), 63–78.

    Article  Google Scholar 

  12. Fabre, A. (1995). Third generation current conveyor: a new active element. Electronics Letters, 31, 338–339.

    Article  Google Scholar 

  13. Altun, M., & Kuntman, H. (2008). Design of a fully differential current mode operational amplifier with improved input-output impedances and its filter applications. AEU: International Journal of Electronics and Communications, 62(3), 239–244.

    Google Scholar 

  14. Arbel, A., & Goldminz, L. (1992). Output stage for current-feedback amplifiers, theory and applications. Analog Integrated Circuits and Signal Processing, 2, 243–255.

    Article  Google Scholar 

  15. Alaybeyoglu, E., Kuntman, H. (2015). A new VDTA based frequency agile filter. 2015 9th international conference on electrical and electronics engineering (ELECO) (pp. 42–45). Retrieved November 26–28, 2015.

  16. Biolek, D., Senani, R., Biolková, V., & Kolka, Z. (2008). Active elements for analog signal processing: classification, review, and new proposals. Radioengineering, 17(4), 15–32.

    Google Scholar 

  17. Yeşil, A., Kaçar, F., & Kuntman, H. (2011). New simple CMOS realization of voltage differencing transconductance amplifier and its RF filter application. Radioengineering, 20(3), 632–637.

    Google Scholar 

  18. Arslan, E., Metin, B., Kuntman, H., & Cicekoglu, O. (2013). MOS-only second order current-mode LP/BP filter. Analog Integrated Circuits and Signal Processing, 74(1), 105–109.

    Article  Google Scholar 

  19. Allen, P. E., & Holberg, D. R. (2002). CMOS analog circuit design (2nd ed.). Oxford: Oxford University Press.

    Google Scholar 

  20. Pandey, N., Pandey, R., Choudhary, R., Sayal, A., Tripathi, M. (2013). Realization of CDTA based frequency agile filter. 2013 IEEE international conference on signal processing, computing and control (ISPCC) (p. 1, 6). Retrieved September 26–28, 2013.

  21. D’Amico, S., Giannini, V., & Baschirotto, A. (2006). A 4th-order active-G/sub m/-RC reconfigurable (UMTS/WLAN) filter. IEEE Journal of Solid-State Circuits, 41(7), 1630–1637.

    Article  Google Scholar 

  22. Junbo, L., Xiangning, F., Kuan, B. (2012). A 4th-order active-Gm-RC low-pass filter with RC time constant auto-tuning for reconfigurable wireless receivers. 2012 IEEE 11th international conference on solid-state and integrated circuit technology (ICSICT) (pp. 1–3). Xi’an.

  23. Lee, D., & Jou, C. (2003) Method of fabricating a MOS capacitor. Google Patents.

  24. Yuce, E., Kircay, A., & Tokat, S. (2008). Universal resistorless current-mode filters employing CCCIIs. International Journal of Circuit Theory and Applications, 36(5-6), 739–755.

    Article  MATH  Google Scholar 

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Istanbul Technical University, Istanbul, Turkey

    Ersin Alaybeyoğlu & Hakan Kuntman

  2. Department of Electrical and Electronics, Bartin University, Bartin, Turkey

    Ersin Alaybeyoğlu

Authors
  1. Ersin Alaybeyoğlu
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  2. Hakan Kuntman
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Correspondence to Ersin Alaybeyoğlu.

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Alaybeyoğlu, E., Kuntman, H. CMOS implementations of VDTA based frequency agile filters for encrypted communications. Analog Integr Circ Sig Process 89, 675–684 (2016). https://doi.org/10.1007/s10470-016-0760-y

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  • DOI: https://doi.org/10.1007/s10470-016-0760-y

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