74.2.2. Basic Need of Differential Amplifier

Try these first

1. 1.

   What is the primary function of a differential amplifier?

   Hint

   Think about what the amplifier is designed to do with the input signals.

2. 2.

   What does common mode signal refer to?

   Hint

   Consider how noise affects both signals similarly.

3. 3.

   What is the purpose of a differential amplifier?

   • To amplify common mode signals
   • To amplify differential signals while suppressing common mode
   • To only amplify noise

   Hint

   Focus on the key role of the amplifier in processing inputs.

4. 4.

   True or False: Differential amplifiers improve signal integrity in noisy environments.

   • True
   • False

   Hint

   Remember how they handle common mode signals.

5. 5.

   Design a simple communication system that uses a differential amplifier to ensure signal clarity over a distance of 100 meters. Describe how your design addresses common mode noise.

   Hint

   Think about circuit configurations that provide input isolation.

6. 6.

   Evaluate the impact of high common mode gain in a practical operational amplifier application. What consequences does it have on the system's performance?

   Hint

   Consider the relationship between input signals and output accuracy.