Lecture_8 - K n is called the Conductance Parameter:...

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EE 310 Lecture 8 The Metal Oxide Semiconductor Field Effect Transistor (MOSFET) Lecture 8 Page 1
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EE 310 Lecture 8 Inducing a Conducting Channel Lecture 8 Page 2
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EE 310 Lecture 8 MOSFET I V Relationship in the Nonsaturation Region i D = K n [2( v GS V TN ) v DS v 2 DS ] (3.2(a)) ))] ( 2 ( 2 ) ( 2 [ 1 TN GS N DS TN GS n DS D DS v v K v V v K v i r = = 0 )] ( 2 [ 1 = DS TN GS n DS v when V v K r For v DS values near zero, the MOSFET behaves like a linear resistor: The MOSFET is strongly nonlinear in this region: Lecture 8 Page 3
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EE 310 Lecture 8 MOSFET I V Relationship in the Saturation Region i D = K n ( v GS V TN ) 2 (3.2(b)) The MOSFET behaves like a voltage-controlled current source in this region: Lecture 8 Page 4
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EE 310 Lecture 8 Characteristic Curves in All Regions Symbols ox ox ox ox n n t C L W C K ε μ = = where 2 1 The constant
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Unformatted text preview: K n is called the Conductance Parameter: Lecture 8 Page 5 EE 310 Lecture 8 Example An NMOS transistor has a conduction parameter, K n , of 250 A/V 2 and a threshold voltage, V TN of 1 volt. Find the drain current, I D , when the gate-source voltage, V GS , is 1V, 2 V, 3 V, and 4 V. Plot I D vs. V GS . V GS (V) I D ( A) 1 2 3 4 Lecture 8 Page 6 EE 310 Lecture 8 p Channel MOSFETs Nonsaturation region behavior: i D = K p [2( v SG + V TP ) v SD v 2 SD ] (3.4(a)) And Saturation region behavior: i D = K p ( v SG + V TP ) 2 (3.4(b)) Lecture 8 Page 7 EE 310 Lecture 8 Channel Length Modulation Lecture 8 Page 8...
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This note was uploaded on 10/02/2008 for the course EE 310 taught by Professor Wharton,markjedwards,perrysto during the Fall '07 term at Pennsylvania State University, University Park.

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Lecture_8 - K n is called the Conductance Parameter:...

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