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Lecture2

Lecture2 - Lecture 2 Thursday 9:43 AM Page 1 V GS V T R on...

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Unformatted text preview: Lecture 2 Thursday, March 31, 2011 9:43 AM March 31, 2010 Page 1 V GS V T R on S D A Switch! |V GS | An MOS Transistor STATIC BEHAVIOR Thursday, March 31, 2011 9:46 AM March 31, 2010 Page 2 n+ n+ S G V GS D V DS > V GS- V T V GS- V T +- n + n + p-substrate D S G B V GS x L V ( x ) + – V DS I D MOS transistor and its bias conditions Regions of Operation Thursday, March 31, 2011 9:50 AM March 31, 2010 Page 3 March 31, 2010 Page 4 (V/μm) c = 1.5 n (m /s ) sat = 10 5 Constant mobility (slope = μ) Constant velocity 0.5 1 1.5 2 2.5 1 2 3 4 5 6 x 10-4 V GS (V) I D (A) 0.5 1 1.5 2 2.5 0.5 1 1.5 2 2.5 x 10-4 V GS (V) I D (A) Mobility Thursday, March 31, 2011 9:52 AM March 31, 2010 Page 5 0.5 1 1.5 2 2.5 1 2 3 4 5 6 x 10-4 V GS (V) I D (A) 0.5 1 1.5 2 2.5 0.5 1 1.5 2 2.5 x 10-4 V GS (V) I D (A) March 31, 2010 Page 6 Quadratic Relationship 0.5 1 1.5 2 2.5 1 2 3 4 5 6 x 10-4 V DS (V) I D (A) VGS= 2.5 V VGS= 2.0 V VGS= 1.5 V VGS= 1.0 V Resistive Saturation V DS = V GS- V T 0.50....
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Lecture2 - Lecture 2 Thursday 9:43 AM Page 1 V GS V T R on...

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