lec09_30_10 - MOSFET Enhancement mode N-channel MOSFET...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
OSFET MOSFET Enhancement mode N-channel MOSFET (NMOSFET) L G W S D N+ N+ P-type Substrate ody) B (Body) OSFET Symbols MOSFET Symbols N-channel ETs P-channel ETs M1 FETs FETs M1 M1 M1 1 If bulk is connected to proper power supply: M1 M1 B at lowest chip potential B at highest chip potential MOSFET in a P- pe Substrate? PMOSFET in a P type Substrate? MOSFET Operation Simplified (Fluid Dynamics Analog) turn n Voltage (threshold voltage) Source Gate Drain V T = turn-on Voltage (threshold voltage) 1) Cut off: V GS < V T , V DS = 0 S D G N+ N+ Tank Tank V T V GS 2) Strong Inversion: V GS > V T , V DS = 0 S D G N+ N+ V T V GS
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3) Non-saturation: V GS > V T , 0 < V DS < V GS -V T 4) Saturation: V GS > V T , V DS > V GS T Flow becomes independent of VDS Simple MOSFET Model (Level = 1) T GS DS V V 0 I Cutoff  T GS DS T GS DS 2 DS DS T GS ' DS V - V V V V λ V 1 V V V V W K I , 2 L W K' Linear, triode, non-saturation     T GS DS T GS DS 2 T GS DS V - V V V V λ V 1 V V L 2 I , Saturation   Φ V Φ V V SB T0 T γ arameters rocess re ' parameters process are λ , , , V , K TO φ parameters geometry device are L W, odel Parameter Names in SPICE Model Parameter Names in SPICE Parameter SPICE Param Units K KP A/V 2 TO
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

lec09_30_10 - MOSFET Enhancement mode N-channel MOSFET...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online