74.2. Basic Characteristic of Differential Amplifier

Try these first

1. 1.

   What is a differential amplifier designed to do?

   Hint

   Remember its primary function.

2. 2.

   Define a common mode signal.

   Hint

   Think of noise shared between two lines.

3. 3.

   What does a differential amplifier primarily amplify?

   • Common mode signal
   • Noise
   • Differential mode signal

   Hint

   Focus on the term 'differential'.

4. 4.

   True or False: Common mode signals are desirable when using a differential amplifier.

   • True
   • False

   Hint

   Think about the purpose of the amplifier.

5. 5.

   An audio signal is sent over a long distance, but due to ground potential differences, noise is introduced. How can a differential amplifier help in such a scenario?

   Hint

   Focus on how the amplifier processes both signals.

6. 6.

   Define the common mode rejection ratio and its significance in the performance of a differential amplifier.

   Hint

   Think about how we quantify the effectiveness of noise suppression.