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AN2386 Fiches technique(PDF) 13 Page - STMicroelectronics

No de pièce AN2386
Description  How to achieve the threshold voltage thermal coefficient
PDF  30 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2386 Fiches technique(HTML) 13 Page - STMicroelectronics

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AN2386
MOS structure
13/30
If the silicon is doped of p-type (n-channel MOSFET) and the polysilicon is also doped of p-
type, (Equation 32),
Φms becomes positive and it can be rewritten as:
Equation 43
and (Equation 39) becomes negative:
Equation 44
and, thus, (Equation 42) becames:
Equation 45
Φ
ms
kT
q
-------
N
g
N
a
•
ni
2
--------------------



ln
=
∂Φ
ms
∂T
-------------
Φ
ms
T
----------
3
K
q
----
•
–
E
go
qT
---------
–
=
∂V
TH
∂T
-------------
Φ
ms
T
----------
2
Φ
F
T
------
•
t
OX
ε
sqNa
ε
OX
Φ
F
---------------------
•
∂Φ
F
∂T
---------
•
6
K
q
----
•
–
2
E
go
qT
---------
•
–
++
=



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