21.6.5. Output Conductance

Try these first

1. 1.

   Define transconductance.

   Hint

   Think about the sensitivity of current to voltage changes.

2. 2.

   What is output conductance?

   Hint

   Consider the relationship between current and voltage at the output.

3. 3.

   What does transconductance (gm) measure?

   • A) Change in output current per change in input voltage
   • B) Change in output voltage per change in input current
   • C) Change in input current per change in output voltage

   Hint

   Recall the definition of gm.

4. 4.

   True or False: Output conductance is independent of the operating point.

   • True
   • False

   Hint

   Consider the influence of biasing conditions on conductance.

5. 5.

   Given a MOSFET with gm = 5 mA/V and Rd = 1 kΩ, calculate the voltage gain of the amplifier circuit.

   Hint

   Remember the voltage gain formula involving transconductance.

6. 6.

   A specific MOSFET operates at an output conductance of 2 mS. How would changing the Vds impact the output current? Explain.

   Hint

   Reflect on the parameter definitions and consider their implications.