Soluções de Problemas de Dispositivos Semicondutores

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Semiconductor Physics and Devices: Basic Principles, 4
th
 edition Chapter 10 
By D. A. Neamen Problem Solutions 
______________________________________________________________________________________ 
_______________________________________ 
 
10.48 
 From Problem 10.37, 111.1nK mA/V 2 
(a)     22 DSDSTGSn
GS
mL VVVVK
V
g 


 
      1.02111.12  DSn VK 
 so 222.0mLg mA/V 
(b)   2
TGSn
GS
ms VVK
V
g 


 
     45.05.1111.122  TGSn VVK 
 so 33.2msg mA/V 
_______________________________________ 
 
10.49 
 From Problem 10.38, 961.0pK mA/V 2 
(a)     22 SDSDTSGp
SG
mL VVVVK
V
g 


 
      1.02961.02  SDp VK 
 or 192.0mLg mA/V 
(b)   2
TSGp
SG
ms VVK
V
g 


 
     35.05.1961.022  TSGp VVK 
 or 21.2msg mA/V 
_______________________________________ 
 
10.50 
(a) 
ox
as
C
Ne

2
 
 Now 
  
8
14
10150
1085.89.3




oxC 
 
710301.2  F/cm 2 
 Then 
    
7
161419
10301.2
1051085.87.11106.12





 5594.0 V 2/1 
(b)   3890.0
105.1
105
ln0259.0
10
16










fp V 
 (i)
   
  
2/1
1619
14
105106.1
3890.01085.87.114











dTx 
 
510419.1  cm 
  maxSDQ 
    51619 10419.1105106.1   
 710135.1  C/cm 2 
 
 
 
fpFB
ox
SD
TO V
C
Q
V 2
max


 
  3890.025.0
10301.2
10135.1
7
7






 
 7713.0 V 
 
L
WC
K oxn
n
2

 
 
   
 2.12
810301.2450 7
 
 
410452.3  A/V 2 
 or 3452.0nK mA/V 2 
 For 0DI , 7713.0 TOGS VV V 
 For 5.0DI   2
7713.03452.0  GSV 
 975.1 GSV V 
(c) (i) For 0SBV , 7713.0 TOT VV V 
(ii) 1SBV V, 
     1389.025594.0  TV 
  389.02 
 2525.0 V 
 024.12525.07713.0 TV V 
 (iii) 2SBV V, 
     2389.025594.0  TV 
  389.02 
 4390.0 V 
 210.14390.07713.0 TV V 
 (iv) 4SBV V, 
     4389.025594.0  TV 
  389.02 
 7294.0 V 
 501.17294.07713.0 TV V 
_______________________________________ 
 
10.51 
   3473.0
105.1
10
ln0259.0
10
16









fp V 
  fpSBfpT VV  22  
     5.23473.0212.0  
  3473.02 
 or 
 114.0 TV V