16.2.2. Example Circuit

Try these first

1. 1.

   What does the term V_GS stand for?

   Hint

   Think about which voltage controls the MOSFET operation.

2. 2.

   Identify the threshold voltage in a MOSFET circuit.

   Hint

   It's the pivotal voltage that indicates the operational state of the MOSFET.

3. 3.

   What happens when the gate-source voltage V_GS is less than the threshold voltage V_th?

   • True
   • False

   Hint

   Think about the effect of not meeting the operational voltage.

4. 4.

   Which of the following describes the output of a common-source amplifier configuration?

   • It provides signal inversion
   • It does not amplify
   • Input is equal to output

   Hint

   Recall what happens to the signals in an amplifier.

5. 5.

   A circuit contains a MOSFET with V_GS = 5V, V_th = 1V, and K = 3 mA/V². What is I_DS?

   Hint

   Calculate V_GS - V_th first.

6. 6.

   In a common-source amplifier, if V_DD = 15V, R_DD = 2kΩ, and the output voltage V_DS is measured at 10V, calculate I_DS.

   Hint

   Think about rearranging the voltage equation to find current.