Date post: | 26-May-2015 |
Category: |
Education |
Upload: | bangon-kali |
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CMOS
StyleProcess
-GM
MOSFET
source
drain
substrate
SiO2 insulator
metal / polysilicon contact
gate
+
-
+G
S
D
10N-type
S
D
n channelnMOS
MOSFET
source
drain
substrate
SiO2 insulator
metal /polysilicon contact
gate
-
+
-G
S
D
10P-type
S
D
p channelpMOS
Inverter
pMOS
nMOS
Vi Vo
A A’
pMOS
nMOS
1
10
VGSp
VGSn
VDD = +5V
VGSn = Vi – 0V = 0V – 0V = 0V
VGSp = Vi – (+5V) = 0V – 5V = -5V
When Vi = 0V= 5
VGSn = Vi – 0V = 5V – 0V = 5V
VGSp = Vi – (+5V) = 5V – 5V = 0V
When Vi = +5V
pMOS = “ON” nMOS = “OFF”
pMOS = “OFF” nMOS = “ON”
= 5
= 0
= 0
= 0
= -5
01
Logic Design (NOR Gate)
Pull-upnetwork
Pull-downnetwork
Inputs
Inputs
NOR Gate
A B Y
0 0 1
0 1 0
1 0 0
1 1 0
A
A
B
B
VDD
Y
0 0
1
pMOS (1)
nMOS (0)
Comparison
A
A’
+
A A’
pMOS
nMOS
+
Bipolar CMOSEnergy efficiencyLarger energy dissipationSlowerLess HeatEase of construction
FasterMore heat
Quad-Core AMD Opteron processorAMD Phenom II overclocked with liquid helium (6.5 GHz @ -267 degrees celcius.Samsung Galaxy
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