L17 FET DC Analysis.ppt

L17 FET DC Analysis.ppt - Recall Last Lecture The MOSFET...

• Notes
• 19

This preview shows pages 1–7. Sign up to view the full content.

© Electronics © Electronics Recall Last Lecture The MOSFET has only one current, I D Operation of MOSFET NMOS and PMOS For NMOS, V GS > V TN V DS sat = V GS – V TN For PMOS V SG > |V TP | V SD sat = V SG + V TP

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

© Electronics © Electronics I D versus V DS (NMOS) or I D versus V SD (PMOS)
© Electronics © Electronics NMOS o V TN is POSITIVE o V GS > V TN to turn on o Triode/non-saturation region o Saturation region o V DSsat = V GS - V TN PMOS o V TP is NEGATIVE o V SG > |V TP | to turn on o Triode/non-saturation region o Saturation region o V SDsat = V SG + V TP

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

© Electronics © Electronics MOSFET DC Circuit Analysis MOSFET DC Circuit Analysis - NMOS The source terminal is at ground and common to both input and output portions of the circuit. The C C acts as an open circuit to dc but it allows the signal voltage to the gate of the MOSFET. In the DC equivalent circuit, the gate current into the transistor is zero , the voltage at the gate is given by a voltage divider principle: V G = V TH = R 2 V DD R 1 + R 2 Use KVL at GS loop: V GS –V TH + 0 = 0 V GS = V TH

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

© Electronics © Electronics MOSFET DC Circuit Analysis - NMOS MOSFET DC Circuit Analysis - NMOS 2. Assume the transistor is biased in the saturation region, the drain current: 3.
This is the end of the preview. Sign up to access the rest of the document.
• Spring '12
• cengizbeşikçi
• Vgs

{[ snackBarMessage ]}

What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern