MOSbasics - Gate Gate Oxide V G> V T-V DS I D V DS NMOS...

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1 MOS Transistor NMOS Structure p- substrate n++ n++ Source Drain V S (= 0) V D (> 0) Gate Gate Oxide PMOS Structure n- substrate p++ p++ Source Drain V S (= 0) V D (< 0) V G (< 0 in Active) Gate Gate Oxide V G (> 0 in Active) D S G D S G I D I D NMOS Transistor – Non-Active Modes Accumulation p- substrate n++ n++ Source Drain V S (= 0) V D (> 0) Gate Gate Oxide V G (<< V T ) + + + + + + + + + + + + + + + V DS I D
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2 NMOS Transistor – Non-Active Modes Flat-Band Condition p- substrate n++ n++ Source Drain V S (= 0) V D (> 0) Gate Gate Oxide V G = V FB V DS I D NMOS Transistor – Non-Active Modes Depletion p- substrate n++ n++ Source Drain V S (= 0) V D (> 0) Gate Gate Oxide V FB < V G < V T V DS I D
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3 NMOS Transistor -- Active Small V DS Inversion p- substrate n++ n++ Source Drain V S (= 0) V D (> 0) Gate
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Unformatted text preview: Gate Gate Oxide V G ( > V T )- - - - - - - - - - - - - - - - - - - -V DS I D V DS NMOS Transistor – Active V DS comparable to (V GS- V T ) p- substrate n++ n++ Source Drain V S (= 0) V D = (V GS- V T ) Gate Gate Oxide V G ( > V T )- - - - - - - - - - - - - - - -p- substrate n++ n++ Source Drain V S (= 0) Gate Gate Oxide V G ( > V T )- - - - - - - - - - - - - - - - - - -0 < V D < (V GS- V T ) V DS I D V DS I D 4 MOS Transistor I D = μ n C ox /2 W/L (V GS- V TN ) 2 I D = μ n C ox W/L [(V GS- V TN )V DS-V DS 2 /2 ] Active Region Triode Region V DS I D...
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