Unit3 Combinational Design
-
Upload
ralph-anthony-constantino-planteras -
Category
Documents
-
view
221 -
download
0
Transcript of Unit3 Combinational Design
-
8/9/2019 Unit3 Combinational Design
1/71
W@FS :
JOEMF@NSFO@NB
CGZFD@
-
8/9/2019 Unit3 Combinational Design
2/71
SO\FJZ
Bodfjnb n`c }gbnsfo`nb
o|g}nso}z
\}ojgzz zsnsgeg`s
Jnzg zsnsgeg`s
Cnsnhbot Zsvbg Mganxfo}nb Zsvbg
Co`s jn}g jo`cfsfo`z
Bookw| snmbgz
z n geg` Boo| zsnsgeg`s
Xn}fnmbgz
-
8/9/2019 Unit3 Combinational Design
3/71
CNSNHBOT ZSVBG
Bodfjnb n`c }gbnsfo`nb o|g}nso}z
Zfd`nb nzzfd`eg`sz G`jocg}z n`c cgjocg}z
Bookw| snmbgz
-
8/9/2019 Unit3 Combinational Design
4/71
O\G]NSO]Z
XACB o|g}nso}z bfzsgc h}oe afdag} so botg}
|}gjgcg`jgEfzjgbbn`gowz )) nmz `os
Ewbsf|bvf`d ) / eoc }ge
Zfd` + % Nccf`d + % (
Zafhs zbb z}b zbn z}n }ob }o}
]gbnsfo`nb 5 /5 2 25 0 05Bodfjnb n`c o} `n`c `o} qo} q`o}
-
8/9/2019 Unit3 Combinational Design
5/71
BODFJNB O\G]NSO]Z
N M `os N N n`c M N n`c M N o} M N o} M N qo} M N q`o} M
< < > < > < > < >
< > > < > > < > < < < > > < > > < > < > < < >
Nbb o|g}nso}z anxg sag zneg bgxgb oh |}gjgcg`jg
gqjg|s ho} `os
Nzzojfnsfxg o|g}nso}z9 n`c" o}" qo}" q`o} N n`c M n`c J %% xnbfc
N n`c M n`c J %% f`xnbfc
-
8/9/2019 Unit3 Combinational Design
6/71
ZFD@NBNZZFD@EG@SZ
N zfd`nb nzzfd`eg`s |bnjgc f` sag zsnsgeg`s |n}s
oh n` n}jafsgjsw}g fz n jo`jw}}g`s zsnsgeg`s. = ho}ez oh jo`jw}}g`s zfd`nb nzzfd`eg`s9
Zgbgjsgc zfd`nb nzzfd`eg`s
Wzf`d Moobgn` gq|}gzzfo` !:}c ho}e&
Zv`sagzfynmbg zfd`nb nzzfd`eg`s ho}e9
sn}dgs 25 xnbwg_gq|}gzzfo`;
-
8/9/2019 Unit3 Combinational Design
7/71
GQNE\BG9 3%SO%> EWBSF\BGQG]
g`sfsv ewq3so> fz
\o}s ! F 9 f` ZSC_BODFJ_XGJSO]
!: cot`so cot`so ;
-
8/9/2019 Unit3 Combinational Design
8/71
GQNE\BG9 3%SO%> EWBSF\BGQG]
Jo`jw}}g`s zfd`nb nzzfd`eg`s wzf`d Moobgn`
gq|}gzzfo`9
n}jafsgjsw}g Cnsnhbot oh ewq3so> fz
V 25 !`os `G& n`c !
!`os Z!>& n`c `os Z!& n`c `os Z!& n`c Z!
-
8/9/2019 Unit3 Combinational Design
9/71
ZGBGJSGC ZFD@NBNZZFD@EG@S
Nbzo jnbbgc n tfsa%zgbgjs%tag` zsnsgeg`s
Fs nbbotz o`g oh zgxg}nb |ozzfmbg xnbwgz so mgnzzfd`gc so n zfd`nb mnzgc o` n zgbgjs
gq|}gzzfo`.
o}e9
tfsa gq|}gzzfo` zgbgjs
sn}dgs 25 xnbwg_gq|}gzzfo`> tag` jaofjgz>"
xnbwg_gq|}gzzfo`=tag` jaofjgz="
xnbwg_gq|}gzzfo`` tag` osag}z;
-
8/9/2019 Unit3 Combinational Design
10/71
GQNE\BG9 3%SO%> EWBSF\BGQG]
Zgbgjsgc zfd`nb nzzfd`eg`s9
n}jafsgjsw}g Cnsnhbot oh ewq3so> fz
mgdf`
t ` zg gj
V 25 F!
-
8/9/2019 Unit3 Combinational Design
11/71
]GBNSFO@NB O\G]NSO]Z
O|g}nso} O|g}nsfo` Bghs
O|g}n`c
]fdas
O|g}n`c
]gzwbs
5 G~wnbfsv N`v gqjg|s
hfbg
Zneg nz
bghs
Moobgn`
/5 F`g~wnbfsv %co% %co% %co%
2 Bgzz san` Zjnbn} o}
joe|ozfsg
cfzj}gsg sv|g
%co% %co%
25 Bgzz san` o}
g~wnb
%co% %co% %co%
0 D}gnsg} san` %co% %co% %co%
05 D}gnsg} san`
o} g~wnb
%co% %co% %co%
-
8/9/2019 Unit3 Combinational Design
12/71
JO@CFSFO@NB ZFD@NBNZZFD@EG@S
Nbzo jnbbgc tag`%gbzg zsnsgeg`s
Fs nbbotz n zfd`nb so mg nzzfd`gc n xnbwg mnzgc o`n zgs oh jo`cfsfo`z !gq|}gzzfo`z f`xobxf`d
}gbnsfo`nb o|g}nso}z&.
o}e9
sn}dgs 25 xnbwg_gq|}gzzfo`> tag` jo`cfsfo`> gbzg
xnbwg_gq|}gzzfo`=tag` jo`cfsfo`=gbzg
xnbwg_gq|}gzzfo``%> tag` jo`cfsfo`%> gbzg
xnbwg_gq|}gzzfo``;
-
8/9/2019 Unit3 Combinational Design
13/71
GQNE\BG9 3%SO%> EWBSF\BGQG]
Jo`cfsfo`nb zfd`nb nzzfd`eg`s9
n}jafsgjsw}g Cnsnhbot oh ewq3so> fz
zfd`nb se| 9 zsc_bodfj_xgjso}!= cot`so
-
8/9/2019 Unit3 Combinational Design
14/71
W@CGZF]GC FE\BFGC BNSJA
-
8/9/2019 Unit3 Combinational Design
15/71
GQNE\BG9 END@FSWCG JOE\N]NSO]
g`sfsv Joe|n}nso} fz
\o}s ! N" M 9 f` ZSC_BODFJ_XGJSO] !4 cot`so$ tag` N 0 M gbzg $$ tag` N 5 M gbzg $$ tag` N 2 M gbzg $
-
8/9/2019 Unit3 Combinational Design
16/71
GQNE\BG9 \]FO]FSVG@JOCG]
F: F= F> F< N> N < < < > < < < > >
-
8/9/2019 Unit3 Combinational Design
17/71
GQNE\BG9 \]FO]FSVG@JOCG]
g`sfsv \G`jocg} fz
\o}s ! F 9 f` ZSC_BODFJ_XGJSO] !: cot`so cot`so $ gbzg
->>- tag` F!:& 5 $>$ gbzg
-YY-;
g`c Jo`cfsfo`nb;
-
8/9/2019 Unit3 Combinational Design
18/71
CO@S JN]G F@\WSZ N@C OWS\WSZ
S}ncfsfo`nb bodfj cgzfd`
Jowbc mg > o} < ]g|}gzg`sgc nz % f` XACB
Zfewbnso}
s}gnsg nz n fsg}n xn wg
Ho} ows|ws" fs f`cfjnsgz sans n jaofjg ho} sans ows|wsz
zsnsg anz `os mgg` encg
Zv`sagzfyg}
s}gnsgc nz n bfsg}nb xnbwg Ho} ows|ws" fs fz s}gnsgc nz n s}wg co`s jn}g jo`cfsfo`
wzgc ho} bodfj ef`fefynsfo`
-
8/9/2019 Unit3 Combinational Design
19/71
GQNE\BG9 \]FO]FSVG@JOCG]
]SB Zjagensfj t/ co`s jn}g jo`cfsfo`z
-
8/9/2019 Unit3 Combinational Design
20/71
GQNE\BG9 \]FO]FSVG@JOCG] T/ CO@S
JN]G JO@CFSFO@Z
N 25 -- tag` sge| 5 ->
-
8/9/2019 Unit3 Combinational Design
21/71
GQNE\BG9 \]FO]FSVG@JOCG] T/ CO@S
JN]G JO@CFSFO@Z ( ZSC_ENSJA
N 25 -
-
8/9/2019 Unit3 Combinational Design
22/71
ZGNSTO]K:%>
>. Dfxg` sag g`sfsv cfnd}ne" j}gnsg n cnsnhbot
XACB cgzj}f|sfo` oh n :%so%1 bf`g cgjocg}. Wzg
zgbgjsfxg zfd`nb nzzfd`eg`s. !@osg9 Hobbot sag
s}wsa snmbg oh sag 43BZ>:1 ho} sag mganxfo} oh sag
z zsge .
`D=M
C!1&`D=N
cgjocg}:so1
D>
N!:&
-
8/9/2019 Unit3 Combinational Design
23/71
ZGNSTO]K:%>
=. Dfxg` sag g`sfsv cfnd}ne" j}gnsg n cnsnhbot
XACB cgzj}f|sfo` oh n 1%f`|ws |}fo}fsv g`jocg}.
Wzg jo`cfsfo`nb zfd`nb nzzfd`eg`s tfsa co`s jn}g
jo`cfsfo`z n`c zsc_ensja hw`jsfo`. !@osg9 Hobbot
sag s}wsa snmbg oh sag 43BZ>31 ho} sag mganxfo} oh
sag zvzsge&.
`G N!:&
\G`jocg}
`DZ`F!1&
`GO
-
8/9/2019 Unit3 Combinational Design
24/71
BOOKW\ SNMBG
N zfe|bg tnv so cgzj}fmg n joemf`nsfo`nb zvzsge
Ho} zf`dbg ows|ws zvzsgez" wzg n jo`zsn`s xgjso} Ho} ewbsf|bg ows|wsz zvzsgez" wzg n` n}}nv oh
jo`zsn`s xgjso}z
zwn v wzgz s g so_ `sgdg} w`jsfo` ow` f`
sag |njkndg `weg}fj_zsc
An}ctn}g fe|bgeg`snsfo` fz zfefbn} so n ]OE
Tag` sn}dgs oh zv`sagzfz fz n \BC" sag zv`sagzfyg}
cogz `os zv`sagzfyg sag jf}jwfs nz n ]OE mws nz n`f`hg}}gc bodfj f` fsz }gcwjgc ho}e.
-
8/9/2019 Unit3 Combinational Design
25/71
BWS GQNE\BG >
N M J V
< < < >
< > < %
bfm}n}v FGGG;
wzg FGGG.ZSC_BODFJ_>>83.NBB;
wzg FGGG.@WEG]FJ_ZSC.NBB;g`sfsv BWS_> fz
\o}s ! N" M" J 9 f` ZSC_BODFJ;
V 9 ows ZSC BODFJ
< > > < < >
> < > %
> > < >> > > ;n}jafsgjsw}g Mganxfo}nb oh BWS_> fz
jo`zsn`s ows|ws 9 zsc_bodfj_xgjso} !< so 4& 95-%%>
-
8/9/2019 Unit3 Combinational Design
26/71
ZFEWBNSFO@ TNXGHO]E
-
8/9/2019 Unit3 Combinational Design
27/71
BWS GQNE\BG =
f`|ws ows|ws
>
><
bfm}n}v FGGG;
wzg FGGG.ZSC_BODFJ_>>83.NBB;
wzg FGGG.@WEG]FJ_ZSC.NBB;
g`sfsv BWS_= fz
\o}s ! f`|ws 9 f` ZSC_BODFJ_XGJSO] !> cot`so cot`so cot`so >-" ->
-
8/9/2019 Unit3 Combinational Design
28/71
ZFEWBNSFO@ TNXGHO]E
-
8/9/2019 Unit3 Combinational Design
29/71
ZGNSTO]K:%=
>. Dfxg` sag hh. s}wsa snmbg" t}fsg n joe|bgsg XACB
cgzj}f|sfo` ho} n cgzfd` g`sfsv `negc sto_ows_bws
sans fe|bgeg`sz sag hw`jsfo` cgzj}fmgc mv sag
s}wsa snmbg nmoxg. Sag n}jafsgjsw}g mocv ewzs
wzg o`b n bookw snmbg so fe bgeg`s safz
hw`jsfo`.
`D=M
C!1&
`D=N
cgjocg}:so1
D>
N!:&
-
8/9/2019 Unit3 Combinational Design
30/71
ZGNSTO]K:%=
=. Dfxg` sag hh. s}wsa snmbg"
t}fsg n joe|bgsg XACBcgzj}f|sfo` ho} n cgzfd`
g`sfsv `negc sto_ows_bws
N M J Q V
< < < > < %
< > < > > < %> < < < < > % >
> > < % > > > >
-
8/9/2019 Unit3 Combinational Design
31/71
MGANXFO]NB ZSVBG
\}ojgzz zsnsgeg`s
Jnzg zsnsgeg`s Fh zsnsgeg`s
Boo| zsnsgeg`s
Xn}fnmbgz
-
8/9/2019 Unit3 Combinational Design
32/71
-
8/9/2019 Unit3 Combinational Design
33/71
JOE\N]FZO@9 HWBBNCCG]
joe|o`g`s Anbh_Nccg} fz
\o}s ! N 9 f` ZSC_BODFJ;
M 9 f` ZSC_BODFJ;
an>9 |}ojgzz!N" M&
mgdf`
fh n 5 $>$ sag`
Zs}wjsw}nb Mganxfo}nb
we 9 ow _ ;
Jows 9 ows ZSC_BODFJ&;g`c joe|o`g`s;
zfd`nb zwezfd" jowszfd>"
jowszfd= 9 ZSC_BODFJ;
zfd> 25 `os m;zfd= 25 m;
gbzg
zfd> 25 m;
zfd= 25 $
-
8/9/2019 Unit3 Combinational Design
34/71
JOE\N]FZO@9 HWBBNCCG] !JO@S&
mgdf`
AN>9 Anbh_Nccg} |o}s en|
! N" M" zwezfd" jowszfd> &;
an=9 |}ojgzz!zfd>" Jf`&
mgdf`
fh zf > 5 $>$ sag`
Zs}wjsw}nb Mganxfo}nb
9 n _ g} |o} en|
! N 50 zwezfd"M 50 Jf`"
Zwe 50 Zwe"
Jows 50 jowszfd=&;
Jows 25 jowszfd> o}jowszfd=;
Zwe 25 `os Jf`;zfd: 25 Jf`;
gbzg
Zwe 25 Jf`;
zfd: 25 $
-
8/9/2019 Unit3 Combinational Design
35/71
JOE\N]FZO@9 HWBBNCCG] !JO@S&
o}>9 |}ojgzz!zfd=" zfd:&
mgdf`
fh zf : 5 $>$ o} zf = 5 $>$
Mganxfo}nb
sag`Jows 25 $>$;
gbzg
Jows 25 $
-
8/9/2019 Unit3 Combinational Design
36/71
\]OJGZZ ZSNSGEG@S
N jo`jw}}g`s zsnsgeg`s sans fz joe|}fzgc oh
zg~wg`sfnb zsnsgeg`sz
Fs jn` }g|}gzg`s sag mganxfo} oh nbb o} zoeg
|o}sfo` oh n cgzfd`
v` nq9
[|}ojgzz_bnmgb9 U
|}ojgzz [!zg`zfsfxfsv_bfzs&U fz
{ |}ojgzz_cgjbn}nsfxg_fsge u
mgdf`
{ zg~wg`sfnb_zsnsgeg`s u
g`c |}ojgzz [|}ojgzz_bnmgb U;
-
8/9/2019 Unit3 Combinational Design
37/71
\]OJGZZ ZSNSGEG@S
Jn` mg wzgc so cghf`g joemf`nsfo`nb n`c
zg~wg`sfnb zvzsgez
@o zfd`nbz jn` mg cgjbn}gc f` n |}ojgzz.
Zg`zfsfxfsv bfzs fz o|sfo`nb
|}ojgzz t n zg`z x v z ewz `o jo` n `
tnfs zsnsgeg`sz.
N |}ojgzz tfsaows n zg`zfsfxfsv bfzs ewzs jo`snf` ns
bgnzs o`g tnfs zsnsgeg`s" o} fsz zfewbnsfo` tfbb `gxg}
g`c
-
8/9/2019 Unit3 Combinational Design
38/71
\]OJGZZ ZSNSGEG@S
= }g~wf}geg`sz ho} n |}ojgzz so zv`sagzfyg so n
joemf`nsfo`nb zvzsge n}g9
>. Sag |}ojgzzz zg`zfsfxfsv bfzs ewzs jo`snf` nbb
zfd`nbz }gnc f` sag |}ojgzz.
=. N zf `nb o} xn}fnmbg nzzf `gc n xnbwg f` n }ojgzz
ewzs mg nzzfd`gc n xnbwg f` nbb |ozzfmbg gqgjwsfo`zoh sag |}ojgzz.
-
8/9/2019 Unit3 Combinational Design
39/71
ZG@ZFSFXFSVBFZS
Fs fz n bfzs oh zfd`nbz so tafja n |}ojgzz fz
zg`zfsfxg
Sagzg zfd`nbz jn` mg zfd`nbz cgjbn}gc f` sag
g`jbozf`d n}jafsgjsw}g n`c/o} |o}sz oh sag
O}cg} oh zfd`nbz fz `os fe|o}sn`s
-
8/9/2019 Unit3 Combinational Design
40/71
XACBZ ZG^WG@SFNB ZSNSGEG@SZ
zfd`nb nzzfd`eg`s
xn}fnmbg nzzfd`eg`s tnfs
nzzg}sfo`
jnzg
`wbb Fh
boo|
}g|o}s |}ojgcw}g jnbb
}gsw}`
`gqs gqfs
-
8/9/2019 Unit3 Combinational Design
41/71
JNZG ZSNSGEG@S
Fs fz n||}o|}fnsg so wzg safz zsnsgeg`s tag` sag
zgbgjsfo` jn` mg mnzgc o` sag xnbwg oh n zf`dbg
gq|}gzzfo`
G~wfxnbg`s so n jo`jw}}g`s zgbgjsgc zfd`nb
Zv`snq9
jnzg gq|}gzzfo` fz
tag` jaofjgz 50 zg~wg`jg_oh_zsnsgeg`sz
{ tag` jaofjgz 50 zg~wg`jg_oh_zsnsgeg`sz u
g`c jnzg [ jnzg_bgxgb U;
-
8/9/2019 Unit3 Combinational Design
42/71
GQNE\BG9 QO]_JNZG
g`sfsv QO]_jnzg fz
\o}s ! N" M 9 f` ZSC_BODFJ;
J 9 ows ZSC_BODFJ&;
g`c QO]_jnzg;
n}jafsgjsw}g Mganxfo}nb oh QO]_jnzg fz
gdf`
|}ojgzz!N" M&
mgdf`
jnzg zsc_bodfj_xgjso}$!N"M& fz
tag` -- r ->$;
tag` osag}z 50 J 25 $
-
8/9/2019 Unit3 Combinational Design
43/71
GQNE\BG9 CGJOCGn}jafsgjsw}g Mganxfo}nb oh cgjocg fz
mgdf`
jnzgv9 |}ojgzz!d_mn}" n" m&mgdf`
v< 25 $>$; v> 25 $>$; v= 25 $>$; v: 25 $>$;
jnzg zsc bo fj xgjso}$ mn} n m fz_ _ _
tag` -
-
8/9/2019 Unit3 Combinational Design
44/71
ZFEWBNSFO@ OWS\WS !T/ F@FSFNBFYNSFO@&
-
8/9/2019 Unit3 Combinational Design
45/71
ZFEWBNSFO@ OWS\WS
!T/O F@FSFNBFYNSFO@&
-
8/9/2019 Unit3 Combinational Design
46/71
ZGNSTO]K:%:
Wzf`d n jnzg zsnsgeg`s"t}fsg n mganxfo}nbcgzj}f|sfo` sans
n m j T V
< < < > $; v> 25 $>$; v= 25 $>$; v: 25 $>$;
fh !d_mn} 5 $ 25 $$& n`c !m 5 $$&& sag` v: 25 $v
\}ombge zsnsgeg`s S}wsa snmbg
wzgz n |}ojgzz sansjo`snf`z n` fh
zsnsgeg`s.
< > < >
< > > >
> < < >
> < > > < >
> > > >
-
8/9/2019 Unit3 Combinational Design
53/71
BOO\ ZSNSGEG@S
Fs jo`snf`z n zg~wg`jg oh zg~wg`sfnb zsnsgeg`sz
sans jn` mg }g|gnsgcbv gqgjwsgc" yg}o o} eo}g
sfegz.
Gqgjwsfo` jo`sf`wgz w`sfb boo| fz sg}ef`nsgc nz n
Joe|bgsfo` oh fsz fsg}nsfo` zjageg Gqgjwsfo` oh n` gqfs zsnsgeg`s
Gqgjwsfo` oh n `gqs zsnsgeg`s sans z|gjfhfgz n bnmgb
owszfcg oh sag boo|
Gqgjwsfo` oh n }gsw}` zsnsgeg`s
N }gsw}` zsnsgeg`s jn` n||gn} f`zfcg n boo| o`bv fh sag boo|
fz f` n zwm|}od}ne.
-
8/9/2019 Unit3 Combinational Design
54/71
BOO\ ZSNSGEG@S
Zv`snq9
[ boo|_bnmgb9 U
[ fsg}nsfo`_zjageg U boo|
zg~wg`jg_oh_zsnsgeg`sz
_
fsg}nsfo`_zjageg9ho} fcg`sfhfg} f` cfzj}gsg_}n`dg
tafbg jo`cfsfo`
cfzj}gsg_}n`dg9cfzj}gsg_zwmsv|g_f`cfjnsfo`
}n`dg
-
8/9/2019 Unit3 Combinational Design
55/71
HO] BOO\ ZSNSGEG@S
Fs fz zv`sagzfynmbg
Sag fcg`sfhfg} zg}xgz nz n` fe|bfjfs cgjbn}nsfo` oh
n boo| |n}negsg}.
Sag boo| |n}negsg}z sv|g fz sag mnzg sv|g oh sag
zj}g g }n`dg.
Sag boo| |n}negsg} o`bv gqfzsz tafbg sag boo| fzmgf`d gqgjwsgc" n`c fz `os xfzfmbg owszfcg oh sag
boo|.
Sag boo| |n}negsg} fz s}gnsgc nz n jo`zsn`s"sawz" jn` mg }gnc mws jn``os mg t}fssg`
-
8/9/2019 Unit3 Combinational Design
56/71
HO] BOO\ ZSNSGEG@S
Zv`snq9
[ boo|_bnmgb9 U
ho} fcg`sfhfg} f` }n`dg boo|
zg~wg`jg_oh_zsnsgeg`sz
g`c boo| [boo|_bnmgb U;
-
8/9/2019 Unit3 Combinational Design
57/71
TAFBG BOO\ ZSNSGEG@S
Fs fz `os zv`sagzfynmbg
Fs fz wzghwb f` sgzsmg`jagz
Sag jo`cfsfo` fz gxnbwnsgc mgho}g gnja fsg}nsfo`
Fh jo`cfsfo` fz s}wg" sag zg~wg`jg oh zsnsgeg`sz f` sag
oo| z gqgjw g .
Fh jo`cfsfo` fz hnbzg" sag fsg}nsfo` zjageg fz joe|bgsgn`c sag boo| fz sg}ef`nsgc.
Sag jo`cfsfo` fz `os sgzsgc cw}f`d sag gqgjwsfo`
oh sag zg~wg`jg oh zsnsgeg`sz f` sag boo|.
-
8/9/2019 Unit3 Combinational Design
58/71
TAFBG BOO\ ZSNSGEG@S
Zv`snq9
[ boo|_bnmgb9 U
tafbg jo`cfsfo` boo|
zg~wg`jg_oh_zsnsgeg`sz
g`c boo| [boo|_bnmgb U;
-
8/9/2019 Unit3 Combinational Design
59/71
@GQS ZSNSGEG@S
Fs fz wzgc so sg}ef`nsg sag jw}}g`s fsg}nsfo` oh n`
g`jbozf`d boo| zsnsgeg`s n`c do so sag `gqs
fsg}nsfo`.
Fh sag `gqs zsnsgeg`s f`jbwcgz n jo`cfsfo`"
jo`cfsfo`nb.N `gqs zsnsgeg`s sans anz n boo| bnmgb fz o`bv
nbbotgc tfsaf` sag boo| sans anz sans bnmgb" n`c
n||bfgz so o`bv sans boo|.
-
8/9/2019 Unit3 Combinational Design
60/71
@GQS ZSNSGEG@S
N `gqs zsnsgeg`s tfsaows n boo| bnmgb fz o`bv
nbbotgc tfsaf` n boo|" n`c n||bfgz o`bv so sag
f``g}eozs g`jbozf`d boo|.
Gqgjwsfo` oh n `gqs zsnsgeg`s jn` jnwzg n boo| so
"
owsg} boo| n`c sag `gqs zsnsgeg`s anz n bnmgbsans cg`osgz sag owsg} boo|.
Zv`snq9
[ bnmgb9 U `gqs [ boo|_bnmgb U [ tag` jo`cfsfo`U;
-
8/9/2019 Unit3 Combinational Design
61/71
GQFS ZSNSGEG@S
Fs fz wzgc so sg}ef`nsg sag gqgjwsfo` oh n`
g`jbozf`d boo| zsnsgeg`s.
Fh fs f`jbwcgz n jo`cfsfo`" sg}ef`nsfo` oh sag boo|
fz jo`cfsfo`nb.
` gq z n geg` t n oo| n g z o` v
nbbotgc tfsaf` sag boo| sans anz sans bnmgb" n`cn||bfgz so o`bv so sag f``g}eozs g`jbozf`d boo|
!tagsag} bnmgbgc o} `os&.
-
8/9/2019 Unit3 Combinational Design
62/71
GQFS ZSNSGEG@S
Ho} sag gqgjwsfo`" sag jo`cfsfo`" fh |}gzg`s" fz
hf}zs gxnbwnsgc. Sag boo| fz sg}ef`nsgc fh sag
xnbwg oh sag jo`cfsfo` fz s}wg o} fh sag}g fz `ojo`cfsfo`.
[ bnmgb9 U gqfs [ boo|_bnmgb U [ tag` jo`cfsfo`U; Gqne|bg9
gqfs tag` q 5 =7;
-
8/9/2019 Unit3 Combinational Design
63/71
-
8/9/2019 Unit3 Combinational Design
64/71
ZFEWBNSFO@ TNXGHO]E
-
8/9/2019 Unit3 Combinational Design
65/71
XN]FNMBG
Wzgc so zso}g f`sg}egcfnsg xnbwgz f` n |}ojgzz o}
zwm|}od}ne
= kf`cz
@o}enb xn}fnmbgz jn` o`bv mg njjgzzgc h}oe n zf`dbg
Zan}gc xn}fnmbgz jn` mg njjgzzgc h}oe ewbsf|bg|}ojgzzgz n`c n}g `os zv`sagzfynmbg
Ewzs mg cgjbn}gc f` sag cgjbn}nsfxg |n}s oh sag
|}ojgzz o} zwm|}od}ne f` tafja sagv n}g wzgc
Bojnb so sag |}ojgzz o} zwm|}od}ne f` tafja fs fz
cgjbn}gc
-
8/9/2019 Unit3 Combinational Design
66/71
XN]FNMBG
Zv`snq9
xn}fnmbg fcg`sfhfg}_bfzs 9 zwmsv|g_f`cfjnsfo` [ 95
gq|}gzzfo` U;
F`fsfnbfynsfo`9
xn}fn g jow`s 9 zs _ odfj_xgjso} : ot`so < 95
-
8/9/2019 Unit3 Combinational Design
67/71
XN]FNMBGZ XZ ZFD@NBZ
Ewzs mg cgjbn}gcf`zfcg sag |}ojgzz
Ewzs mg cgjbn}gcowszfcg oh sag |}ojgzz
Xn}fnmbgz Zfd`nbz
f` tafja fs fz cgjbn}gc
|}ojgzzgz f` sagn}jafsgjsw}g f` tafja
fs fz cgjbn}gc
-
8/9/2019 Unit3 Combinational Design
68/71
GQNE\BG9 END_JOE\3MFSn}jafsgjsw}g Mganxfo}nb oh end_joe|3mfs fz
mgdf`
joe|9 |}ojgzz!|" ~&
xn}fnmbg |_ds_~_x" |_bs_~_x" |_g~_~_x9 zsc_bodfj;
mgdf`
|_ds_~_x 25 $
-
8/9/2019 Unit3 Combinational Design
69/71
ZGNSTO]K:%7
>. T}fsg n joe|bgsg mganxfo}nb zsvbg cgzj}f|sfo`
sans wzgz n boo| f`zs}wjsfo` so fe|bgeg`s n` 1%
f`|ws @N@C dnsg. Sag f`|ws so sag dnsg fz n` 1%mfs xgjso} `neg f`|wsz n`c sag ows|ws fz `negc
`n`cows. @neg sag g`sfs `n`c1 n`c sag
n}jafsgjsw}g maxboo|.
-
8/9/2019 Unit3 Combinational Design
70/71
-
8/9/2019 Unit3 Combinational Design
71/71
ZOW]JG
XACB ho} G`df`gg}z" Kg``gsa Zao}s" \gn}zo`
Gcwjnsfo`" F`j." =