Abstract
Crosstalk analysis in very-large-scale (VLSI) interconnects is usually carried out using finite-difference time-domain (FDTD) methods. However, the stability of FDTD is limited by the Courant–Friedrichs–Lewy (CFL) stability criteria. In this work, we propose an innovative FDTD algorithm to overcome the stability limitations due to the CFL criteria and make the analysis absolutely stable for all times. Using the proposed FDTD method, we analyze the response of coupled interconnects for symmetric and asymmetric inputs with both in-phase and out-of-phase switching. We further analyzed the functional switching and determined how to reduce noise peaks due to crosstalk. For all responses, we compared our new algorithm with HSPICE results, revealing greatly enhanced accuracy and central processing unit (CPU) runtime compared with conventional FDTD. Finally, relative and absolute stability analyses of the proposed FDTD method were carried out using Nyquist and Routh–Hurwitz (R–H) criteria.
Similar content being viewed by others
References
Burke, P.J.: Luttinger liquid theory as a model of the gigahertz electrical properties of carbon nanotubes. IEEE Trans. Nanotechnol. 1(5), 129–144 (2002)
Dresselhaus, M.S., Dresselhaus, G., Avouris, P.: Topics in Applied Physics, Carbon Nanotubes: Synthesis, Structure, Properties and Applications. Springer, Berlin (2000)
Li, H., Yin, W.Y., Banerjee, K., Mao, J.F.: Circuit modeling and performance analysis of multi-walled carbon nanotube interconnects. IEEE Trans. Electron Devices 55(6), 1328–1337 (2008)
Liang, F., Wang, G., Lin, H.: Modeling of crosstalk effects in multiwall carbon nanotube interconnects. IEEE Trans. Electromagn. Compat. 54(1), 133–139 (2012)
Li, X., Mao, J., Swaminathan, M.: Transient analysis of CMOS-gate driven RLGC interconnects based on FDTD. IEEE Trans. CAD Integr. Circuits Syst. 30(4), 574–583 (2011)
Kumar, V.R., Kaushik, B.K., Patnaik, A.: Improved crosstalk noise modeling of MWCNT interconnects using FDTD technique. Microelectr. J. 46(12), 1263–1268 (2015)
Orlandi, A., Paul, C.R.: FDTD analysis of lossy, multiconductor transmission lines terminated in arbitrary loads. IEEE Trans. Electromagn. Compat. 38(3), 388–399 (1996)
Namiki, T.: A new FDTD algorithm based on alternating-direction implicit method. IEEE Trans. Microw. Theory Tech. 47(10), 2003–2007 (1999)
Kumar, V.R., Kaushik, B.K., Patnaik, A.: An unconditionally stable FDTD model for crosstalk analysis of VLSI interconnects. IEEE Trans. Compon. Packag. Manuf. Technol. 5(12), 1810–1817 (2015)
Nishad, A.K., Sharma, R.: Performance improvement in SC-MLGNRs interconnects using interlayer dielectric insertion. IEEE Trans. Emerg. Top. Comput. 3(4), 470–482 (2015)
Ahmed, I., Chua, E.K., Li, E.P., Chen, Z.: Development of the three-dimensional unconditionally stable LOD-FDTD method. IEEE Trans. Antennas Propag. 56(11), 3596–3600 (2008)
Sun, C., Trueman, C.W.: Unconditionally stable Crank-Nicolson scheme for solving two-dimensional Maxwell’s equations. Electron. Lett. 39(7), 595–597 (2003)
Afrooz, K.: Time domain analysis of field effect transistors using unconditionally stable finite difference method. IET Sci. Measur. Technol. 10(7), 686–692 (2016)
Kumar, V.R., Majumder, M.K., Alam, A., Kukkam, N.R., Kaushik, B.K.: Stability and delay analysis of multi-layered GNR and multi-walled CNT Interconnects. J. Comput. Electron. 14(2), 611–618 (2015)
Dhiman, R., Chandel, R.: Delay analysis of buffer insertion sub-threshold interconnects. Analog Integr. Circuits Sig. Process. (2016). https://doi.org/10.1007/s10470-016-0860-8
Rai, M.K., Kaushik, B.K., Sarkar, S.: Thermally aware performance analysis of single-walled carbon nanotube bundle as VLSI interconnects. J. Comput. Electron. 15(2), 407 (2016)
Das, D., Rahaman, H.: Analysis of crosstalk in single- and multiwall carbon nanotube interconnects and its impact on gate oxide reliability. IEEE Trans. Nanotechnol. 10(6), 1362–1370 (2011)
Burke, P.J.: An RF circuit model for carbon nanotubes. IEEE Trans. Nanotechnol. 2(1), 55–58 (2003)
Naeemi, A., Meindl, J.D.: Design and performance modeling for single-walled carbon nanotubes as local, semiglobal, and global interconnects in gig scale integrated systems. IEEE Trans. Electron Devices 54(1), 26–37 (2007)
Kim, W., Javey, A., Tu, R., Cao, J., Wang, Q., Dai, H.: Electrical contacts to carbon nanotubes down to 1 nm in diameter. Appl. Phys. Lett. 87, 173101-1–173101-3 (2005)
Srivastava, A., Xu, Y., Sharma, A.K.: Carbon nanotubes for next generation very large scale integration interconnects. J. Nanophoton. 4(1), 1–26 (2010)
Kantartzis, N.V., Tsiboukis, T.D.: Modern EMC Analysis Techniques: Time-Domain Computational Schemes, vol. 1, 1st edn, pp. 1–224. Morgan & Claypool, San Rafael (2008)
Corradini, L., Maksimovic, D., Mattavelli, P., Zane, R.: Digital Control in Digital Control of High-Frequency Switched-Mode Power Converters, vol. 1, pp. 360–370. Wiley-IEEE Press, New York (2015)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Venkataiah, C., Satyaprasad, K. & Prasad, T.J. FDTD algorithm to achieve absolute stability in performance analysis of SWCNT interconnects. J Comput Electron 17, 540–550 (2018). https://doi.org/10.1007/s10825-017-1125-1
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10825-017-1125-1