Analysis of Power Supply Voltage Drop (IR-Drop) and Propagation Delay Using Folded Graphene Nano Ribbon Interconnect (F-GNR) Interconnect

Authors Sandip Bhattacharya1, Baanala Vijaya1, Subhajit Das2, Debaprasad Das3

1Department of Electronics and Communication Engineering, SR University, Warangal, Telangana, India

2HiSIM Research Center, Hiroshima University, Japan

3Department of Electronics and Communication Engineering, Assam University, Silchar, Assam, India

Issue Volume 15, Year 2023, Number 1
Dates Received 01 January 2023; revised manuscript received 17 February 2023; published online 24 February 2023
Citation Sandip Bhattacharya, Baanala Vijaya, et al., J. Nano- Electron. Phys. 15 No 1, 01017 (2023)
PACS Number(s) 81.05.Uw, 63.22.Np, 61.46.Np.
Keywords Folded Graphene nanoribbon (FGNR), Interconnect, IR-Drop, Delay.

In this work, a comparative analysis is performed in terms of power supply voltage drop (IR-Drop) and propagation delay (PD) of three different graphene nanoribbon (GNR) based interconnect models i.e., vertical GNR (V-GNR), horizontal GNR (H-GNR), and folded GNR (F-GNR) for next generation high speed and low power IC design. To perform IR-Drop and delay analysis for three different interconnect models, a 10-stage cascaded CMOS inverter (i.e., 16nm PTM-HP CMOS model) is used, where each inverter is connected with three different interconnect models (i.e., V-GNR, H-GNR, and F-GNR). Each interconnect model consists of different RLC values, which are calculated using some standard mathematical model. From the above analysis, it is observed that F-GNR is showing less Peak IR-Drop (~ 200 mV @ 1st stage, ~ 215 @ 5th stage, ~ 232 @ 10th stage) compared with V-GNR (~ 210 mV @ 1st stage, ~ 224.4 @ 5th stage, ~ 256.67 @ 10th stage) and H-GNR (~ 272.33 mV @ 1st stage, ~ 277.88 @ 5th stage, ~ 282.45 @ 10th stage) at 0.4 eV Fermi energy. In terms of power consumption, F-GNR is showing less power consumption (i.e., 2.06e-005 Watt) compared with V-GNR (i.e., 3.80  10 – 5 Watt) and H-GNR (i.e., 4.08  10 – 5 Watt). In terms of propagation delay, F-GNR is showing ~2-5 times less delay in several cascaded stages (i.e., starting from the 1st stage up to the 10th stage) compared with V-GNR and H-GNR interconnect. The above analysis is useful for next-generation high-speed IC design using nano-interconnect materials.

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