VLSI Design of Low Power Booth Multiplier

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This paper proposes the design and implementation of Booth multiplier using VHDL. This compares the power consumption and delay of radix 2 and modified radix 4 Booth multipliers. Experimental results demonstrate that the modified radix 4 Booth multiplier has 22.9% power reduction than the conventional radix 2 Booth Multiplier.

Continuous advances of microelectronic technologies make better use of energy, encode data more effectively, transmit information more reliable, etc. Particularly, many of these technologies address low-power consumption to meet the requirements of various portable applications.

In these application systems, a multiplier is a fundamental arithmetic unit and widely used in circuits. VHDL is one of the common techniques for the digital system emergent process. The  technique is done by program using certain software which performs simulation and examination of the designed system. The designer only needs to describe his digital circuit design in textual form which can remove without the effort to alter the hardware.

VHDL is more preferred because this technique can reduce cost and time, easy to troubleshoot, portable, a lot of platform software support the VHDL function and high references availability. All the processes will be running using Xilinx ISE 8.2i software which means the process is simulated only without any hardware implementation.

Multiplication is a fundamental operation in most signal processing algorithms. Multipliers have large area, long latency and consume considerable power. Therefore low-power multiplier design has been an important part in low-pow er VLSI system design.

Fast multipliers are essential parts of digital signal processing systems. The speed of multiplier operation is of great importance in digital signal processing as well as in the general purpose processors today. The basic multiplication principle is two fold i.e., evaluation of partial products and accumulation of the shifted partial products.
Source: NIT Rourkela
Author: Moumita Ghosh

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