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Transcript
FIELD-EFFECT Transistors (FETs) MOSFET = metal-oxide semiconductor FET MOSFET can be made quite small, compared to BJT Most VLSI circuits are MOS technology: digital logic & memory chips can be made just from MOS FETs (no diodes or resistors are needed) Chpt. 5 1 Enhancement-type NMOS mm , W = 2 - 500 mm, oxide layer thickness 0.02 - 0.1 mm L=1-10 Chpt. 5 2 n-channel MOSFET (“NMOS”) +ve voltage applied to gate : Chpt. 5 3 NMOS with small v_DS Chpt. 5 4 NMOS as v_DS increases Chpt. 5 5
