A New Architecture for Signed and Unsigned Multiplier by using Radix-4 Process
Supriya Sarkar1, Sanghita Deb2, G. Dilip3

1Supriya Sarkar , M. Tech Student, Dept. of ECE, RKDF Institute of science and technology, Bhopal , India.
2Sanghita Deb, B. E Student , Dept of CSE, N.H College of engineering, BAMU , Aurangabad ,M.S ,India.
3G .Dilip, M. Tech, Dept. of ECE, Jayamukhi institute of technology and science, Warangal , India.

Manuscript received on November 11, 2013. | Revised Manuscript received on November 15, 2013. | Manuscript published on November 25, 2013. | PP:1-4 | Volume-2 Issue-1, November 2013. | Retrieval Number: A0549112113/2013©BEIESP

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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This paper presents the design and implementation of signed-unsigned Modified Booth Encoding (SUMBE) multiplier. The present Modified Booth Encoding (MBE) multiplier and the Baugh-Wooley multiplier perform multiplication operation on signed numbers only. The array multiplier and Braun array multipliers perform multiplication operation on unsigned numbers only. Thus, the requirement of the modern computer system is a dedicated and very high speed unique multiplier unit for signed and unsigned numbers. Therefore, this paper presents the design and implementation of SUMBE multiplier. The modified Booth Encoder circuit generates half the partial products in parallel. By extending sign bit of the operands and generating an additional partial product the SUMBE multiplier is obtained. The Carry Save Adderr (CSA) tree and the final Carry Lookahead (CLA) adder used to speed up the multiplier operation. Since signed and unsigned multiplication operation is performed by the same multiplier unit the required hardware and the chip area reduces and this in turn reduces power dissipation and cost of a system.
Keywords: SUMBE, MBE, CSA, CLA. Baugh-wooley multiplier.