EE 332 Lesson 0715 - 7/16/2010 SMALL SIGNAL MODEL /PNP BJT...

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7/16/2010 1 ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock EE 332 DEVICES AND CIRCUITS II WEEK 4 ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock g m : small signal transconductance= r : small signal input resistance= r o : small signal output resistance= SMALL SIGNAL MODEL / PNP BJT O m g C T I V A C V I B B b C C c F B F b i I i i I i I i   Pnp small signal model is identical to npn Total current = DC current ac current 5 ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock SMALL SIGNAL MODEL / FIELD-EMITTER TRANSISTOR v gs Oxide layer (insulator) i g v ds i d v gs i d v ds g m v gs r o r g , i g =0 The different between BJT and MOSFET is r g . 6 ©UW EE TC Chen Microelectronic Circuit Design Jaeger/Blalock MOSFET AMPLIFIER / OUTPUT RESISTANCE 2 2 ( ) (1 ) 2 2 ( )(1 ) () 21 1 11 n D GS TN DS DS GS TN DS D m Q n GS TN DS GS GS TN DS n D o Q GS TN DS DS DS o o D D K i v V v for v v V i I g K V V v v V V iK I g V V vV V r g I I 
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This note was uploaded on 10/12/2010 for the course IT 23211 taught by Professor Tai during the Summer '10 term at Punjab Engineering College.

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EE 332 Lesson 0715 - 7/16/2010 SMALL SIGNAL MODEL /PNP BJT...

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