66.4. Load Line Characteristic

Try these first

1. 1.

   What is an active load?

   Hint

   Think about how active components differ from resistive elements.

2. 2.

   Name one limitation of common emitter amplifiers.

   Hint

   Consider what components are used in the circuit.

3. 3.

   What is the primary benefit of using an active load in amplifiers?

   • Increase supply voltage
   • Enhance voltage gain
   • Reduce component count

   Hint

   Think about what makes amplifiers more effective.

4. 4.

   True or False: The load line characteristic is essential for determining the operational limits of an amplifier.

   • True
   • False

   Hint

   Refer back to how we discuss the operational points.

5. 5.

   Design a common emitter amplifier with an active load. Calculate the expected voltage gain if the resistor value is 4k ohms and the quiescent current is 10 mA.

   Hint

   Use the relationship between current, resistance, and gain in your calculations.

6. 6.

   You have a common source amplifier experiencing thermal runaway due to supply voltage increases. Propose a solution that includes active load analysis.

   Hint

   Think about how active loads can manage current variations better than passive ones.