EEE334 FINAL EXAM QUESTIONS AND
ANSWERS 100% PASS
Why are NMOS and PMOS used in CMOS? - ANS more design flexibility
When analyzing CMOS, what do you assume and then check at the end? - ANS Saturation. If
wrong in end, redo the analysis and assume triode region
What does a MOSFET act like when operating in the triode or linear region? - ANS Like a
voltage-controlled resistor. The drain current increases with the drain-source voltage
What happens to the parts of a MOSFET when operating in saturation? What does the MOSFET
act like? - ANS The drain current is nearly constant as VDS increases, so it acts like a voltage-
controlled current source. Used in amplifiers
What are the units of Cox? - ANS F/m^2
What is the equation for Cox? - ANS Epsilon(ox)/thickness(ox)
What is Epsilon(ox)? - ANS permittivity
What is the permittivity of silicone dioxide? - ANS 3.9
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, What is epsilon 0? - ANS 8.854 * 10^-12 F/m
What is the equation for Kn'? - ANS Mu*Cox
What are the units for Kn'? - ANS A/V^2
What does PMOS look like? - ANS
What does NMOS look like? - ANS
When the gate is connected to the drain, what region is the CMOS operating in? -
ANS Saturation
When the gate is connected to the drain, what is true about their voltages? - ANS they are
equal in magnitude
What is another equation for ro in terms of the drain-source voltage and drain current? IF gate-
source voltage is constant? - ANS ro=delta VDS/ delta iD
What is VA equal to? IF gate-source voltage is constant? - ANS ~Drain Current * ro
What is the first step for analyzing transistor amplifier circuits? - ANS perform DC analysis.
Calculate the small signal parameters (gm and ro). Assume gate current is zero. Eliminate small
signal sources -> capacitors are open
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS 100% PASS
Why are NMOS and PMOS used in CMOS? - ANS more design flexibility
When analyzing CMOS, what do you assume and then check at the end? - ANS Saturation. If
wrong in end, redo the analysis and assume triode region
What does a MOSFET act like when operating in the triode or linear region? - ANS Like a
voltage-controlled resistor. The drain current increases with the drain-source voltage
What happens to the parts of a MOSFET when operating in saturation? What does the MOSFET
act like? - ANS The drain current is nearly constant as VDS increases, so it acts like a voltage-
controlled current source. Used in amplifiers
What are the units of Cox? - ANS F/m^2
What is the equation for Cox? - ANS Epsilon(ox)/thickness(ox)
What is Epsilon(ox)? - ANS permittivity
What is the permittivity of silicone dioxide? - ANS 3.9
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What is epsilon 0? - ANS 8.854 * 10^-12 F/m
What is the equation for Kn'? - ANS Mu*Cox
What are the units for Kn'? - ANS A/V^2
What does PMOS look like? - ANS
What does NMOS look like? - ANS
When the gate is connected to the drain, what region is the CMOS operating in? -
ANS Saturation
When the gate is connected to the drain, what is true about their voltages? - ANS they are
equal in magnitude
What is another equation for ro in terms of the drain-source voltage and drain current? IF gate-
source voltage is constant? - ANS ro=delta VDS/ delta iD
What is VA equal to? IF gate-source voltage is constant? - ANS ~Drain Current * ro
What is the first step for analyzing transistor amplifier circuits? - ANS perform DC analysis.
Calculate the small signal parameters (gm and ro). Assume gate current is zero. Eliminate small
signal sources -> capacitors are open
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
