Introduction
Due to integration of comonents increased the o!er comes in
"ime "ight
#t is much imortant that handhe"d de$ices must ossess "o!
 o!er de$ices
 
Po!er Dissiation)
*he rate of energy !hich is ta+en from the source and
con$erted into heat
Dynamic Po!er dissiation
 
techni-ues to reduce o!er dissiation
Vo"tage
Vo"tage reduction offers an effecti$e means of o!er reduction
/ factor of t!o reduction in su"y $o"tage yie"ds a factor of four
decreases in o!er consumtion
'ut the erformance is a"so getting reduced
*o a$oid the abo$e stated rob"em
*hresho"d $o"tage shou"d be sca"ed do!n
 
Dynamic o!er consumtion deends "inear"y on the hysica"
caacitance being s!itched
,o minimiing caacitance offers another techni-ue to for
minimiing o!er consumtion
*he caacitor can be +et as sma"" by..
Minimum "ogic
,ma""er de$ices
*here are t!o comonents to s!itching acti$ity )
!hich determines the a$erage eriodicity of data arri$a"s
2 &s!( !hich determines ho! many transitions each arri$a" !i"" generate
,!itching acti$ity is reduced by
,e"ecting roer a"gorithms architecture otimiation
Proer choice of "ogic too"ogy
 
*o reducing dynamic o!er dissiation
!or+s by ta+ing the enab"e conditions attached to registers and
uses them to gate the c"oc+s
Power Gating
igh Vt s"ee transistors !hich cut off VDD from a circuit b"oc+ !hen
the b"oc+ is not s!itching
/"so +no!n as M*M, Mu"ti*hresho"d M,
 
ogic %unction
ogic ,ty"e
ircuit ,tructure
Power &ini'i(ation Tec!ni$ues Reducing chi and ac+age caacitance
Process de$e"oment such as ,# !ith artia""y or fu""y de"eted !e""s
/d$anced interconnect substrates such as Mu"tihi Modu"es &MM(.
,ca"ing the su"y $o"tage
Very effecti$e
*he in$estment to reduce o!er by design is re"ati$e"y sma""
sing o!er management strategies
 
"#D &et!odologies and Tec!ni$ues o! o!er V,# design can be achie$ed at $arious "e$e"s of the
design rocess.
,ystem Design
sa$e o!er.
'eha$ioura" ,ynthesis
/""ocation
*hese stes determine ho! many instances of each resource
are needed.
ogic ,ynthesis
Physica" Design
#ncreasing of handhe"d de$ices
ong battery "ife
ong de$ice "ife