Read transistor cours Allal text version

(Si) (Gi)

1 . 2 : la jonction . . NPN * ( P )P .N . PNP * . P 3

N

.E

C

NPN B I E = IB + IC : E

1

4

. 6V Allal mahdade

0V

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CE . UBE . UCE . :

2

IB

1 2 3 CE 2 K IC

UBE(V) IB(mA) IC(mA)

IC IB

CE . . . . . . IC IB : : : 1 2 12 : IC=0 IC

BE IB=f(UB)

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Us

UBE>Us UBE<US : . (CE)

BE

.

. . . :

IC=g(IB)

2 2 BE 32 3 13 23 33 43

.

UBE

IC = IB

IC=0 IB=0 UBE<0,6V * BE . IC>0 IB>0 UBE>US IB : b IC=bIB : IB IC . IC IB . IC IB IB IC=Cte .UCE0 : US=0,6V 5 . 1 5 LDR . K 1 K 2 . LDR 3 . . 4 : (IC0) (IB0) . IC=0 IB=0 . . . :

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:

.

(

25 1 M . 2 . 3 : MN IB=0 IC=0 . MN IB0 . IC0 . : . 3 5 ) · ( ( ). · ) · : : G . E1 BD131 . IC0=0,2A L . R1=5.103 R 150 106 . . : . . MA 1 2 3 . 4

.Y

.

IB UAM UAM>0 1 4

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. =100 .

UAM=0,4V d=2cm .

2

2 4 5 6 7

UBE=0,6V

E1

. IB=1mA I

=100

UAC=8V : . UCE=6V UBE=0,7V . 1 . IC R1 2 3 . R3 IE

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transistor cours Allal

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