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Now a days, low power Very Large Scale Integration (VLSI) circuit plays an important role in designing efficient energy saving electronic systems for high speed performance. In VLSI, low power dissipation is the main criterion in many electronic devices out of speed, area, etc., like mobile phones, laptops, high speed work stations etc., Due to the integration of many components on the VLSI circuit...
This present paper, a 3 transistor XNOR gate is proposed. The proposed XNOR gate is designed using CADENCE EDA tool and simulated using the SPECTRE VIRTUOSO at 180 nm technology. The proposed results are compared with the previous existing designs in terms of power and delay. It is observed that the power consumption is reduced by 65.19 % for three transistor XNOR gate and 48.11% for eight transistor...
The paper proposes a new methodology for optimization and characterization of flip-flops that can be utilized in designing EDA tool for NOC. In automated RTL to GDS II design space there is requirement of libraries with large number of cells. Now each design can have large number of different driving strength cells. Hence the paper proposes a methodology by virtue of which the library size can be...
Full adder is an essential component for the design and development of all types of processors viz. digital signal processors (DSP), microprocessors etc. Adders are the core element of complex arithmetic operations like addition, multiplication, division, exponentiation etc. In most of these systems adder lies in the critical path that affects the overall speed of the system. So enhancing the performance...
Elimination of the p-MOS transistor from the pass gate network significantly reduces the parasitic capacitances associated with each node in the circuit, thus, the operation speed is typically higher as compared to the CMOS counterpart. But then the improvement in the transient characteristics comes at the price of increased process complexity. In Complementary pass transistor logic (CPL) circuit,...
The adder circuit is used as a main component in the multiplier circuits. The Baugh-Wooley, Braun and CSA multipliers are designed by using our proposed adder cell. The proposed adder circuit is designed by using Shannon theorem. The multiplier circuits are schematised by using DSCH2 VLSI CAD tool and their layouts are generated by using Microwind 3 VLSI CAD tool. The proposed adder based multiplier...
Low power multipliers with high clock frequencies play an important role in today's digital signal processing. In this work, the performance analysis of Wallace-tree, Array and Baugh-Wooley multiplier architectures is carried out. Physical verification of all the sub-blocks is performed using HSpice to check their functionality and to optimize for low power by using transistor sizing. The layouts...
In recent years, low power design has become one of the main focuses of digital VLSI circuits. As technology scales, leakage currents in contemporary CMOS logic have become one of the main power consumers. Contrary to conventional methods for power reduction, where efforts are taken to reduce subthreshold leakage, operation of digital circuits in the subthreshold region, utilizes this current, minimizing...
Full adders are important components in applications such as digital signal processors (DSP) architectures and microprocessors. In addition to its main task, which is adding two numbers, it participates in many other useful operations such as subtraction, multiplication, division, address calculation, ..Etc. In this paper we have presented study of different logic structure using 1-bit full adder...
Modern VLSI design requires a tradeoff between circuit speed and power dissipation. Timing optimization methods typically lead to excessive power consumption. In this work, we explore the energy/performance design space in CMOS circuits, to find gate sizes which produce the lowest possible power for any specified circuit delay. The tradeoff between energy and performance is achieved by relaxing the...
In this paper we have analyzed an 8-bit multiplier circuit using non clocked pass gate families with help of carry save multiplier (CSA) technique. The multiplier cell of the adder is designed by using pass transistors (n-transistors), p-transistors used as cross-coupled devices. The adder cell is designed by using multiplexing control input techniques. A combination of n- and p-transistors used on...
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