week_4_new - 22 Chapter 3 D ox n m eff ox n m I L W C g V L...

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Unformatted text preview: 22 Chapter 3 D ox n m eff ox n m I L W C g V L W C g 2 = = If source is at a different potential than body contact, you have body effect . You also introduce an additional trans-conductance known as body effect trans- conductance s g . s g exists only when SB V at ac b in this case although you have body effect changing your n t V , but it does not effect your overall trans- conductance ) ( = s v Equivalent circuit is modified: ) 2 2 ( f f SB t t V V V n n - + + = C 23 f SB m s V g g + = 2 2 Common Source Amplifier Non-integrated form S ds L D m v R R R R R r R R g A +- = 1 2 1 2 || ) || )( || || ( 2 1 || R R R in = ds D out r R R || = . sb C . B . db C gd C ds r gs C . gs m v g sb s v g S G D Ideal MOS equation valid only D D DD DS t GS DS t GS ox D DD GS I R V V V V V V V L W C I V R R R V n n- =- >- = + = 2 2 1 2 ) ( 2 . . ~ . . 1 R 2 R D R S R L R 1 C 2 C in R out R s v DD V DD V 24 - 1 R , 2 R and D R are set by biasing condition - S R and L R...
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This note was uploaded on 02/19/2012 for the course ECE 455 taught by Professor Mohammadi during the Fall '10 term at Purdue University-West Lafayette.

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week_4_new - 22 Chapter 3 D ox n m eff ox n m I L W C g V L...

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