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EE 332 Lesson 0706 - NON-IDEAL BEHAVIOR/TRANSFER...

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7/6/2010 1 ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock EE 332 DEVICES AND CIRCUITS II WEEK 3 BIPOLAR JUNCTION TRANSISTORS ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock NON-IDEAL BEHAVIOR / TRANSFER CHARACTERISTICS n(0) Base p-type electrons diffuse to +x and current direction -x n(W B ) (equilibrium minority concentration) [F.A.R.] since current heading -x Therefore, 2 2 (0) exp( ) ( ) (1 exp( )) exp( ) exp( ), BE BO T B BO i BO A n BE C n BO B T n i BE B A T BE C S T S v n n V n W n n n N qAD v n i i qAD n x W V qAD n v i W N V v i I V qAD I     2 n i B A n W N 7 ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock NON-IDEAL BEHAVIOR / TRANSFER CHARACTERISTICS Example Problem : Compare I S of npn and pnp, which is larger? Given : A i B n S N n W qAD I 2 8 ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock NON-IDEAL BEHAVIOR / TRANSFER CHARACTERISTICS Example ANSWER S p n p n D i B p S I D D N n W qAD I pnp higher has npn
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  • Summer '10
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  • Trigraph, Bipolar junction transistor, Microelectronic Circuit Design, EE TC Chen, ©UW EE TC, Circuit Design Jaeger/Blalock

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