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Semi4ExSol15
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Semi4ExSol15
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Devendra Chauhan
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Semiconductor Physics and Devices: Basic Principles, 4 th edition Chapter 15 By D. A. Neamen !ercise Solutions """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""" """"""""
Chapter 15 Exercise Solutions
1 1 5 4& = ⋅ I D ,ma! ⋅V DD = ' ' ' '
P T
Ex 15.1
V CC
=
#a$ V CEQ
'
= 5& +
= %& (
""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""" """""
= I CQ ⋅ V CEQ %& = I CQ ( %& ) ⇒ I CQ = 1 A I C ( ma! ) = ' I CQ = ' A P T
R L
=
V CC
=
I C ( ma!)
V CC
=
#*$ V CEQ
'
)&
= %& Ω
'
= '& (
= I CQ ⋅ V CEQ %& = I CQ ( '& ) ⇒ I CQ = 1.5 A I C ( ma! ) = ' I CQ = % A V CC
=
I C ( ma! )
=
#c$ V CEQ
P ( ma! )
=
V CC '
4&
= '5 + I C ( ma! ) = 5 A R L
=
I C ( ma!)
=
5
= 4Ω
""""""""""""""""""""""""""""""""""""""" Ex 15.2
#a$ BV DSS
I D , ma!
= V DD = '4 (
=
V DD R L
=
'4 1'
s
bi
R
) N
1
N N + N a
d
a
d
1/ '
Nelectin V bi , x
n
'(11. ) (.5 ×1& −14 )( '&&) = 1.) ×1& −10
1&1) 1 × 14 14 1) 1& 1& + 1& or x n = 5&.) µ m
1 5 = ⋅ I C , ma! ⋅V CEQ = (1&) ' '
'&
' ∈ (V + V = e
= 1%.% Ω
%
= 1& (
V CC
TYU 15.1 #a$ Collec Collector tor -eion -eion,,
x n
P T
R L
Test Your Understanding Solutions
='A
1/ '
#*$ #*$ Base Base -ei -eion on,,
( × − ) = '(11. ) .5 1&− ( '&& ) 1.) × 1& 14
x p
10
1&14 1 × 1) 14 1) 1& 1& + 1&
1/ '
or x p = &.5&) µ m """"""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""" """"" TYU 15.2 V CE = 'V CC
− I C R E = '& − I C ( &.' )
So P T
#*$
1 1 ' '4 = ⋅ I D, ma! ⋅ V DD = ' ' ' '
= 1' + BV DSS = V DD = 4& ( I D , ma!
=
V DD R L
=
4&
=5A
& = '& − I C ( ma! ) ( &.' )
⇒ I C ( ma! ) = 1&& mA 2a!imum po3er at the center o the load line
'V I C ( ma!) '& &.1& = CC ' = ' ' ' P ma! = &.5 +
P ma!
Semiconductor Physics and Devices: Basic Principles, 4 th edition Chapter 15 By D. A. Neamen !ercise Solutions """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""
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