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n
i
v
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2
c.
m
a
1.
I
NT
RO
D
UCT
I
O
N
Hig
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elec
tr
o
n
ic
m
o
b
ilit
y
tr
a
n
s
is
to
r
s
(
HE
MT
)
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ased
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n
Ga
N
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av
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k
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o
w
n
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g
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ter
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ig
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f
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eq
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en
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y
,
an
d
h
ig
h
-
te
m
p
er
atu
r
e
ap
p
licatio
n
s
[
1
]
,
[
2
]
,
an
d
p
o
s
e
s
p
ec
if
ic
ch
a
l
len
g
e
s
s
u
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p
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itiv
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s
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co
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tr
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o
f
tr
ap
p
ed
ch
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g
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th
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m
al
d
is
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ip
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w
h
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ar
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cr
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cial
to
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ar
a
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d
h
ig
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-
f
r
eq
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en
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y
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er
f
o
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m
a
n
ce
[
3
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.
T
h
ey
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v
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tte
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atten
tio
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m
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tr
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ics
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s
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cr
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f
ield
o
f
th
e
w
id
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b
an
d
g
ap
m
ater
ial
[
4
]
,
[
5
]
.
A
l
s
o
,
th
e
A
l
GaN
/GaN
tr
an
s
is
t
o
r
s
ca
n
m
ai
n
tai
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s
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g
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if
ica
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ig
h
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r
r
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en
s
itie
s
co
m
p
ar
ed
to
o
th
er
I
I
I
-
V
HE
MT
s
[
6
]
.
GaN
h
as
attr
ac
t
i
v
e
elec
tr
o
n
ic
an
d
th
er
m
al
p
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o
p
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ties
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s
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c
h
a
s
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g
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ea
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d
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v
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s
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g
h
ca
r
r
ier
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atio
n
,
an
d
g
o
o
d
th
er
m
al
co
n
d
u
ct
iv
it
y
[7
]
-
[
9
]
.
T
o
ex
p
lain
th
e
f
r
eq
u
e
n
c
y
b
eh
av
io
r
o
f
th
e
A
lGa
N/GaN
d
ev
i
ce
,
a
p
r
ec
is
e
an
al
y
s
i
s
o
f
th
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c
ap
ac
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s
r
elate
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ld
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Fo
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p
ar
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m
eter
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v
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[
1
0
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to
o
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tain
th
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ch
ar
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ter
is
tics
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ca
p
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ca
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d
g
ate
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r
ain
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T
h
e
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r
in
cip
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j
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tiv
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o
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s
w
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ev
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ical
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A
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GaN
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ir
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Evaluation Warning : The document was created with Spire.PDF for Python.
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I
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d
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J
E
lec
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n
g
&
C
o
m
p
Sci
,
Vo
l.
40
,
No
.
3
,
Dec
em
b
er
20
25
:
1
2
6
1
-
1
2
6
9
1262
g
ate
v
o
lta
g
e
an
d
w
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co
m
p
ar
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th
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m
w
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2.
M
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H
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2
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1
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T
o
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a
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ha
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cha
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l c
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ar
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iv
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[
1
1
]
:
=
(
,
)
(
1
)
w
h
er
e,
(
,
)
is
p
r
esen
t
th
e
s
h
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t
ca
r
r
ier
co
n
ce
n
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t
w
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s
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-
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f
o
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m
ed
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A
l
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h
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er
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n
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n
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it’s c
an
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e
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by
[
1
2
]
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(
,
)
=
(
)
(
−
ℎ
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,
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−
(
,
)
)
(
2
)
w
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e
m
,
q
,
T
ar
e
th
e
alu
m
i
n
u
m
m
o
le
f
r
ac
tio
n
in
AlGa
N/GaN
,
th
e
elec
tr
o
n
ch
ar
g
e
an
d
th
e
te
m
p
er
atu
r
e
r
esp
ec
tiv
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y
.
(
)
illu
s
tr
ate
s
th
e
d
i
elec
tr
ic
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n
s
ta
n
t o
f
A
lGa
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is
th
e
ad
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itio
n
o
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n
d
o
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ed
A
l
GaN
s
p
ac
er
la
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er
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ick
n
es
s
,
an
d
th
e
d
o
p
ed
A
lGaN
la
y
er
t
h
ic
k
n
e
s
s
,
as
m
o
n
tio
n
n
ed
in
Fi
g
u
r
e
1
th
a
t
p
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esen
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u
n
d
a
m
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tr
u
ct
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r
e
o
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tr
a
n
s
is
to
r
s
HE
MT
s
A
lGaN
-
GaN
,
(
,
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i
s
th
e
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o
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itio
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o
f
t
h
e
Fer
m
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le
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h
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h
is
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f
u
n
ct
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o
f
(
,
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an
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ex
p
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n
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i
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[
1
3
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(
,
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=
1
(
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+
2
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(
,
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+
3
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3
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w
it
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1
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2
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d
3
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ee
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ar
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eter
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w
h
ic
h
d
ep
en
d
o
n
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e
te
m
p
er
a
tu
r
e.
Fig
u
r
e
1
.
Diag
r
a
m
i
n
cr
o
s
s
-
s
e
ctio
n
o
f
A
lGaN
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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I
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N
:
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I
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4
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(
2
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)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
d
o
n
esia
n
J
E
lec
E
n
g
&
C
o
m
p
Sci
I
SS
N:
2502
-
4752
Dev
elo
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men
t o
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a
lysi
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(
A
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2
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3
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2
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r
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MT
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atica
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it is
g
i
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2
1
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(
2
7
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3
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21
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24
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24
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s
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(
2
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2
.
4
.
Ca
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f
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f
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d
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2
.
4
.
1
.
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urce
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pa
cit
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3
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Gate
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ate
v
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ltag
e
Evaluation Warning : The document was created with Spire.PDF for Python.
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d
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N:
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5
.
Var
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CO
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1
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