Summarize FET. E-MOSFETD-MOSFET โครงสร้างและสัญลักษณ์ทาง ไฟฟ้าของ FET JFET.

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Presentation transcript:

Summarize FET

E-MOSFETD-MOSFET โครงสร้างและสัญลักษณ์ทาง ไฟฟ้าของ FET JFET

JFET Charateristics Graph ( (I D,V GS ), (I D,V DS ) ) ( N-channel) JFET V GS I D cutoff = 0 V GS > V P -> I D cutoff > 0 V GS = 0 -> I D max = I DSS Ohmic region Pinch off point Active Region (Constant current)

D-MOSFET Charateristics Graph ( (I D,V GS ), (I D,V DS ) ) ( N-channel) D-MOSFET V GS I D cutoff = 0 V GS > V P -> I D cutoff > 0 V GS = 0 -> I D max = I DSS Depletion Mode Enhancement Mode The more the negative value of Vgs The less amount of current flow from D-to-S Electrons from D-to-S channel Push to P-type substrate The more the positive value of Vgs The larger amount of current flow from D-to-S Electrons from D-to-S channel Pulled to D-S channel (N-channel) +

E-MOSFET Charateristics Graph ( (I D,V GS ), (I D,V DS ) ) ( N-channel) E-MOSFET V GS I D cutoff = 0 V GS > V P -> I D cutoff > 0

Characteristics Graph ( (I D,V GS ), (I D,V DS ) ) ( N-channel) JFETD-MOSFET E-MOSFET