68.1.2. Introduction

Try these first

1. 1.

   What is an active load?

   Hint

   Think about how load affects amplifier performance.

2. 2.

   Why is it beneficial to match β values in BJTs?

   Hint

   Consider how current impacts overall circuit behavior.

3. 3.

   What is the primary purpose of using active loads in amplifiers?

   • To reduce current
   • To enhance voltage gain
   • To decrease resistance

   Hint

   Consider how load type affects the gain.

4. 4.

   True or False: The collector current of both transistors in an active load design should be unequal to maintain performance.

   • True
   • False

   Hint

   Remember the importance of balance in multi-transistor configurations.

5. 5.

   Given a circuit diagram of a CE amplifier, analyze the impact of varying the active load resistance on voltage gain and output impedance.

   Hint

   Consider the relationships established in previous exercises about load resistance.

6. 6.

   Determine the effects on the amplifier’s performance if one BJT has a significantly lower beta than its counterpart when both are configured with an active load.

   Hint

   Think about how effective biasing could mitigate the issue.