curs_4 - Curs 4 TranzistorulC MOS Cuprins Introducere...

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Curs 4: TranzistorulC MOS
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CMOS VLSI Design CMOS VLSI Design 4th Ed. 4: CMOS Transistor Theory 2 Cuprins Introducere Condensatorul MOS Caracteristicile nMOS I-V Caracteristicile pMOS I-V Capacitatea Poartă (Gate) și difuzie
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CMOS VLSI Design CMOS VLSI Design 4th Ed. 3: CMOS Transistor Theory 3 Introducere Am privit tranzistoarele ca și switch-uri Printr-un tranzistor ON trece o cantitate finită de curent Depinde tensiunea pe terminal Decurg relaţiile de curent-tensiune (I-V) Gate-ul, sursa și drena toate au capacitanțe I = C ( V/ t) -> t = (C/I) V Capacitanța și curentul determină viteza
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CMOS VLSI Design CMOS VLSI Design 4th Ed. 3: CMOS Transistor Theory 4 Capacitorul MOS Poarta și corpul de la capacitorul MOS Moduri de operare Acumulare Epuizare (Depletion) Inversare
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CMOS VLSI Design CMOS VLSI Design 4th Ed. 3: CMOS Transistor Theory 5 Tensiunile Terminal Modul de operare depinde de V g , V d , V s – V gs = V g – V s – V gd = V g – V d – V ds = V d – V s = V gs - V gd Sursa și drena sunt terminale cu difuzie simetrică Prin convenție, sursa este un terminal la tensiune joasa Prin urmare V ds 0 Corpul nMOS body este la GND. Pp că sursa este și ea 0. Trei regiuni de operare Cutoff Linear Saturation V g V s V d V gd V gs V ds + - + - + -
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CMOS VLSI Design CMOS VLSI Design 4th Ed.
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