MOSFET Small Signal Model Quiz

In the small signal model of a MOSFET, the transconductance g_m is defined as:

• VDS/ID

• ID/VGS

• ∂ID/∂VGS at constant VDS

• ∂VGS/∂ID

Which small signal parameter represents the output resistance in the MOSFET model?

• g_m

• r_o

• Cgs

• λ

What is the unit of the transconductance g_m?

• Ohm

• Volt

• Siemens

• Ampere

In the small signal equivalent circuit of a MOSFET, the controlled current source is represented as:

• gmVDS

• gmVGS

• gmVDS + ro

• VGS/gm

For a MOSFET operating in saturation, which condition must be true to use the small signal model?

• VDS < VGS - VT

• VDS = 0

• Signal variations are large

• Signal variations are small around the Q-point