34.1.3. Bias Resistor Selection

Try these first

1. 1.

   What role do bias resistors play in a common source amplifier?

   Hint

   Think about what happens when an amplifier operates beyond its limits.

2. 2.

   Define the DC operating point in terms of amplifier performance.

   Hint

   Consider how the amplifier needs to function for AC signals.

3. 3.

   What happens if the biasing is incorrect?

   • True
   • False

   Hint

   Think back to the operation limits of the amplifier.

4. 4.

   The output swing should be equal on both sides for optimal performance.

   • True
   • False

   Hint

   Consider how distortion occurs in practice.

5. 5.

   Design a common source amplifier that operates with a supply voltage of 15V and a required output swing of 10V, selecting bias resistor values to achieve this.

   Hint

   Consider the implications of the swing on resistor values.

6. 6.

   Given a bias current set at 1 mA, how would you adjust your design if the maximum gain needs to be achieved?

   Hint

   Examine the relationship of gain with respect to the transistor parameters.