75.6.2. Active Components to Improve Performance

Try these first

1. 1.

   What does a differential amplifier do?

   Hint

   Think about its purpose in electronics.

2. 2.

   What are the two types of gain characterized in differential amplifiers?

   Hint

   Recall the two components that can affect amplifier performance.

3. 3.

   What is the goal of a differential amplifier?

   • To amplify all signals equally
   • To amplify the difference in input signals
   • To reduce signal noise

   Hint

   Consider the specific definition of 'differential'.

4. 4.

   True or False: Increasing A_c is beneficial for a differential amplifier's performance.

   • True
   • False

   Hint

   Discuss the importance of noise rejection versus amplification.

5. 5.

   Design a basic differential amplifier circuit schematic using a BJT. Explain the component choices and how they meet the performance expectations for A_d and A_c.

   Hint

   Think about the importance of matching in amplifiers.

6. 6.

   Given a differential amplifier with a known A_c, suggest modifications to the circuit to decrease it while maintaining A_d. Justify your suggestions.

   Hint

   Reflect on how active components can enhance performance.