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EE 332 Lesson 0629 - NPN TRANSISTOR FORWARD CHARACTERISTICS...

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6/29/2010 1 ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock EE 332 DEVICES AND CIRCUITS II 06/29 BIPOLAR JUNCTION TRANSISTORS ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock NPN TRANSISTOR: FORWARD CHARACTERISTICS 1 2 1 2 2 2 ( 1) ( 1) ( )( 1) ( 1) BE T BE T BE T SE BE T E E E v V E C S v V E S v V E S S I v V E SE i i i i i I e i I e i I I e i I e E (N) B (P) C (N) v BE i C =i E1 i E2 Electron ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock NPN TRANSISTOR: FORWARD CHARACTERISTICS C S E SE i I i I 1 C E i i Common-base current gain: i E2 is not part of the basic transistor action Make it as small as possible E (N) B (P) C (N) v BE i C =i E1 i E2 Electron ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock Both current common-emiiter current gain [exp( ) 1] [exp( ) 1] BE T BE B Ba Bb T C B v V v i i i V and i i NPN TRANSISTOR: FORWARD CHARACTERISTICS
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