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In this paper, four different single ended delay cells based ring oscillators have been presented. Output frequencies of ring oscillators have been controlled by varying the supply voltage 1.4V to 3.0V. The active load concept has been used in proposed circuits. First design shows frequency variation in the range [4.50–1.40] GHz with phase noise −87.79dBc/Hz @1MHz in saturated load. Second design...
This research paper observes dynamic crosstalk delay for different single and bundled carbon nanotube (CNT) structures. These CNT structures are implemented by using three coupled line bus architecture. HSPICE simulations are performed for different single and bundled single-walled and double-walled CNT (SWCNT and DWCNT) structures. A bundled DWCNT shows approximately 90.8% and 60.4% improvement in...
This research paper introduces a new modeling approach for different bundled CNT structures. Based on the arrangements of single- and multi-walled CNTs in bundle, two different structures of mixed CNT bundles (MCBs) are proposed. Performance in terms of propagation delay is compared between different bundled CNT structures by using a driver-interconnect-load (DIL) system. It has been observed that...
Multi-layer graphene nanoribbon (MLGNR) can be considered as an emerging interconnect material in current deep-submicron and nano scale technology. This research paper presents an equivalent RLC model for MLGNR interconnects that is primarily based on the geometry. Using the RLC model, propagation delay, power dissipation and power-delay product are analyzed for different number of layers in MLGNR...
Multi-walled carbon nanotube (MWCNT) bundles have potentially provided attractive solution over Cu or other materials used in global VLSI interconnects. Initially, this research paper proposes an equivalent single conductor (ESC) of MWCNT which is well accurate to a multiple transmission line RLC network with an average error of 1.67% or below. Finally, a novel modeling approach of MWCNT bundles with...
This research paper presents a comparative analysis of power and delay performance between different bundled carbon nanotube (CNT) structures. An equivalent RLC model is developed for novel mixed CNT bundle structures that contains single- and multi-walled CNTs (SWCNTs and MWCNTs). Crosstalk delay and power dissipation have been compared for these proposed structures of mixed CNT bundles. It has been...
Multi-layer graphene nanoribbon (MLGNR) is a potential candidate for deep-nanometer-interconnect applications due to its superior conductivity and current carrying capabilities. This research paper presents an equivalent RLC model for MLGNR interconnects to study the dynamic crosstalk effect. A two-coupled line bus architecture employing CMOS driver is used to analyze the in-phase and out-phase crosstalk...
Multi-layer graphene nanoribbons (MLGNRs) have potentially provided attractive solution over single-layer GNR (SLGNR) interconnects. This research paper presents an equivalent RLC model for GNR interconnects to study the effect of propagation delay. A driver-interconnect-load (DIL) system employing CMOS driver is used to analyze the performance. It has been observed that the overall delay performance...
This paper reviews a VLSI architecture based on ‘Parallel Pipeline Projection Engine’ (PPPE) which is composed by Forward Radon Transform and Back-projection architecture. This PPPE architecture is modified by using the theory of two-dimensional Radon Transform. The novel architecture is primarily based on analytical relationship between the pixels on horizontal and vertical raster scan line and also...
Carbon nanotubes (CNTs) have been proved as an emerging interconnect material for future nano and deep submicron level technologies. CNTs are more advantageous than copper or other interconnect materials because of their robustness to electromigration. In this paper, single-wall CNT (SWNT)-based interconnects are modeled and the effects of crosstalk are evaluated. On comparing the crosstalk effects...
Carbon nanotubes (CNTs) are one of the most promising interconnect material for future deep-submicron and nano scale technology. They are more advantageous than copper or other interconnect materials because of their robustness to electromigration. In this paper, the RLC interconnect models are presented on basis of multi-walled CNT (MWNT) and bundled single-walled CNT (SWNT) by including the concept...
In this paper, a modified VLSI architecture for two-dimensional Radon Transform has been presented. The proposed architecture is primarily based on the analytical relationship between the pixels on horizontal and vertical raster scan line and also between the projection angles. The proposed architecture is compared against the existing ‘Parallel Pipeline Projection Engine’ (PPPE) architecture. Implementation...
Multi-walled carbon nanotubes (MWNT) have provided potentially attractive solution over single-wall carbon nanotube (SWNT) bundles at current very large scale integration (VLSI) technologies. This paper presents a comprehensive analysis of propagation delay for both MWNT and SWNT bundles at different interconnect lengths (global) and shows a comparison of equivalent number of SWNTs in bundle and shells...
Process variation in current nanometer regime has recently emerged as a major concern in the design of very large scale integrated (VLSI) circuits including interconnect. Process variation leads to many uncertainties on circuit performances such as propagation delay. With the shrinking channel dimensions of MOSFET to nanometer scale, the performance of VLSI/ULSI chip becomes less predictable. The...
Multi-wall carbon nanotubes (MWNTs) have potentially provided an attractive solution over single-wall carbon nanotube (SWNT) bundles at deep sub-micron level very large scale integration (VLSI) technologies. This paper presents a comprehensive analysis of propagation delay for both MWNT and SWNT bundles at different interconnect lengths (global) and shows a comparison of area for equivalent number...
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