{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

EE 332 Lesson 0715 - SMALL SIGNAL MODEL/PNP BJT gm small...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
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 ) ( ) 2 1 1 1 1 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 i K I g V V v V V r g I I
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}