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NMOS και CMOS - apel.ee.upatras.gr”ιάλεξη 11... · Σε αντίθεση με τη...
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11
NMOS
CMOS
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2008
NMOS CMOS CMOS
2
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3
NMOS
CMOS
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MOS NAND NOR
CMOS:
( ) MOS ( ). Pass Transistor Logic
4
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NMOS
NMOS
5
NMOS
CMOS
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NMOS
NMOS
NMOS :
6
CMOS,
PMOS,
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NMOS
NMOS
Y : BC ( C) BD (B D):
7
( )
Y A BC BD
Y A BC BD
Y A B C D
= + +
= + +
= + +
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NMOS
NMOS
:
:
: VOL W/L=2.06/1MB, MC, MD: (MB MC MD) W/L=4.12/1L:
8
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1
1
:
1 :
= CDB,
W/L=6.18/1 : Ron Ron S :
(W/L)A=3.09/19
( )
Y AB CDB
Y AB CDB
Y A CD B
= +
= +
= +
,6.18 2.06
on on on on on on
A B S A
R R R R R RW W W WL L L L
+ = + =
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1
1
2 : : B A CD
(W/L)=2(2.06/1)=4.12/1(W/L)+CD=2(2.06/1)=4.12/1
:(W/L)=4.12/1(W/L)C=8.24/1(W/L)D=8.24/1
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F 1 : 21.6F2
2 : 24.7F2 14% !!
1
1
11
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4 : CDB CE ADE
CDB: 3 W/L=3(2.06/1)=6.18/1ADE: CE: (W/L)= (W/L)CE =3.09/1>2.06/1
VOL
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CMOS
CMOS
13
NMOS
CMOS
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CMOS
CMOS
:
NMOS PMOS
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Y A BC BD
Y A BC BD
= + +
= + +
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PMOS
1
PMOS
1
NMOS : 0 , 2 NMOS
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PMOS
1
PMOS
1
( 4 5) : , VDD ( 2 3) NMOS , PMOS ( ). PMOS NMOS ( NMOS) NMOS: PMOS PMOS
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PMOS
1
PMOS
1
17
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PMOS
1
PMOS
1
PMOS PMOS
18
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PMOS
1
PMOS
1
2 3 PMOS ,
19
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PMOS
PMOS
NMOSNMOS worst case: MOS , , C D :
PMOSPMOS worst case: MOS , , C D B:
20
7.5,15 5 11 1
on on on
B
B
R R R WW LL
+ = =
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PMOS
PMOS
21
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PMOS
2
PMOS
2
PMOS NMOS /
NMOS : BCD PMOS : BCD NMOS B C D PMOS: C D
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:
NMOS PMOS
23
Y AB CE CDB ADE= + + +
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,
24
PMOS
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CMOS CMOS
25
NMOS
CMOS
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CMOS CMOS
:
A=0 NMOS PMOS off
=1 Ron MOS
(c)
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Ron
CMOS
Ron
CMOS
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Ron
(VTON
=0.75V, VTOP
=-0.75V, =0.5V0.5, 2F
=0.6V, Kp
=10/V2, Kn
=25/V2
)
onp onnon EQ
onp onn
R RR R
R R= =
+
Ron
W/L
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Pass Transistor Logic (PTL)Pass Transistor Logic (PTL)
Switch Network NMOS ( NMOS ), CMOS (NMOS PMOS )
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AND AND
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B
B
A
F = AB
0
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XOR XOR
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F AB BA= +
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MultiplexerMultiplexer
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1 2F In S In S= +
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Master-Slave D Flip-FlopMaster-Slave D Flip-Flop
CMOS Master-Slave D Flip-Flop
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NMOS
CMOS
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1
(
)
1
(
)
34
. VOL VOH . (: VOL, MN MP , , .)
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2
(
)
2
(
)
35
; W/L , ;
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3
(
)
3
(
)
36
; W/L , 2;
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4
(
)
4
(
)
2.
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( )Y A B C D E = + +
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5
5
38
; transistorMOS. transistorNMOS transistor PMOS, CMOS.
AB
CD
OUT
VDD
E
F
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5
5
39
: Y=((A*B)+(C*D)+(E*F)) (W/L)N 2. 22=4. (W/L)P 5. 53=15.
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6
6
40
, CMOS , 1.25 pF;
2/1
4/1
4/1 4/1
15/1
15/1
15/1
7.5/1
ABCD
OUT
VDD
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6
6
41
(W/L)N 2 (W/L)P 5 8.14 (, Richard C. Jaeger, .445) :
ns
nsns
053.82
053.8,053.8
PLHPHLP
PLH
PHL
=+
=
==
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7
7
42
; transistorPMOS. transistor NMOS transistor PMOS, CMOS.
AB
CD
OUT
VDD
EF
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7
7
43
: Y=NOT((A+B)*(C+D)*(E+F)) (W/L)N 2. 23=6. (W/L)P 5. 52=10.
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CMOS
X = (A+B)(C+D)
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8
8
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ABCD
C
A B
X = (A+B)(C+D)
B
A
D
C
D
X VDD
X
GND
AB
C
PUN
PDN
D
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E
II
2008
E
II
2008
46
,
&
& ,
NMOS CMOS NMOS NMOS NMOS NMOS 1 1 1 CMOS CMOS PMOS 1 PMOS 1 PMOS 1 PMOS 1 PMOS 1 PMOS PMOS PMOS 2 CMOS CMOS Ron CMOS Pass Transistor Logic (PTL)AND XOR MultiplexerMaster-Slave D Flip-Flop 1 ( ) 2 ( ) 3 ( ) 4 ( ) 5 5 6 6 7 7 8 8 E II 2008
