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SYSTEM EVALUATION OF 32BIT UNNSIGNED MULTIPLERUSING CLAA AND CSLA

Presente

Sivasank

M.Tech ,

Priyada

Techno

Under the guidance of

Mr. SOMASEKHAR .A

Assistant Professor

Dept. of ECE

Priyadarshini Institute of Technology & Management

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C!TE!TS

A"ST#ACT$!T#DUCT$!

E%$ST$!& S'STEM

P#"(EMS $! E%$ST$!& S'STEM

P#PSED S'STEM

S(UT$! ) T*E P#"(EM

S$MU(AT$! #ESU(TS ) #E&U(A# CS(A

AD+A!TA&ES APP($CAT$!S

C!C(US$!

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A"ST#ACT

Carry Se-ect Adder CS(A/ is one of the fastest adders used in 0

processing processors to perfor0 fast arith0etic functions.

"y gate -eve- 0odification of CS(A architecture 2e can reduce area and

"ased on this 0odification341bit 0u-tip-ication CS(A architecture

deve-oped.

The proposed design has reduced area and po2er as co0pared 2ith

0u-tip-er,CS(A . This 2ork eva-uates the perfor0ance of the proposed designs in ter0

po2er by hand 2ith -ogica- effort and through %i-in5 $SE 67.6+eri-og

this 2i-- be i0p-e0ented in )P&A Sparton 8/.

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$!T#DUCT$!

$n e-ectronics, an adder or su00er is a digita- circuit that perforof nu0bers.

Adders can be constructed for 0any nu0erica- representations, sucE5cess13, the 0ost co00on adders operate on binary nu0bers.

Adders p-ays Ma9or ro-e in Mu-tip-ications and other advanced

designs

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E%$ST$!& S'STEM

The carry1se-ect adder genera--y consists of t2o #ipp-e CarryAdders #CA/ and a Mu-tip-e5er .

Adding t2o n1bit nu0bers 2ith a carry1se-ect adder is done 2ith therefore t2o #CA/.

$n order to perfor0 the ca-cu-ation t2ice, one ti0e 2ith the assu0carry being :ero and the other assu0ing one.

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#E&U(A# 34 bit 0u-tip-ier CS(A

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AREA EVALUATION METHODOLOGY OF REGULAR 16-bitmuti!i"# CSLA

G$t" %&u't(

)*+HA,FA,MU.

FA(3/+3013.

HA(6+106.

MU(12+30.

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P#"(EMS $! E%$ST$!& S'STEM

The prob-e0 in CS(A design is the nu0ber of fu-- adders are incrthe circuit co0p-e5ity a-so increases.

The nu0ber of fu-- adder ce--s are 0ore thereby po2er consu0ptdesign a-so increases

!u0ber of fu-- adder ce--s doub-es the area of the design a-so increa

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S(UT$! ) T*E P#"(EM

The para--e- #CA 2ith Cin;6 is rep-aced 2ith "inary1E5cess 6 converte

&u#-bit BEC

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M&i4" CLSA

"asic function of C(SA is obtained by using the

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P#PSED S'STEM681b C(SA/

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$n this syste0 2e use the "EC to reduce the #CA circuits*ere based on the carry input the MU% 2i-- be se-ect corresponding

$n this design 2e give the MU% inputs are #CA output and "EC ou

Co0pare to regu-ar design the area of the design is -ess

Contd=

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AREA EVALUATION METHODOLOGY OF MODIFIEmu!ti!i"# CSLA

&ATE CU!T;

)A>MU%>"EC/

63>8>64>6>6>67)

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COMPARISION

GROUP REGULAR MODIFIED

UP 4 ?@

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RTL SCHEMATIC

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Simu$ti&' R"ut

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Eva-uation #esu-ts

Po2er Uti-i:ed ; 34 0B

De-ay; 68.47< ns

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T( USEDProgra00ing -anguage +E#$(& *D(

Too- %i-in5 $SE 67.6/

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AD+A!TA&ES

(o2 po2er consu0ption(ess area -ess co0p-e5ity/

More speed co0pare regu-ar CS(A

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APP($CAT$!S

Arith0etic -ogic units*igh Speed 0u-tip-ications

Advanced 0icroprocessor design

Digita- signa- process

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CONCLUSION

A si0p-e approach is proposed in this paper to reduce the area

of MU(T$P($E# CS(A architecture. The reduced nu0ber of gates o

offers the great advantage in the reduction of area and a-so the p

0odified CS(A architecture is therefore, -o2 area, -o2 po2er,

efficient for +(S$ hard2are i0p-e0entation.

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#E)E#E!CES

6 ". #a0ku0ar, *arish M Fittur G(o2 po2er and Area efficient carry se-ect adTrans,+o-.47,)eb 4764.

4 T. '. Ceiang and M. I. *siao, GCarry1se-ect adder using sing-e ripp-e carry addeLett., vol. 34, no. 22, pp. 21012103, Oct. 1998.

3 '. Fi0 and (.1S. Fi0, G8