75.2.2. Characterization of Differential Amplifier

Try these first

1. 1.

   What is a differential amplifier?

   Hint

   Think about why it has two input terminals.

2. 2.

   What is the ideal property of differential mode gain?

   Hint

   Consider its role in amplifying signals.

3. 3.

   What does a differential amplifier primarily amplify?

   • The sum of the inputs
   • Only the common mode signal
   • The difference between the inputs

   Hint

   Think about the purpose of having two inputs.

4. 4.

   True or False: Ideal differential mode gain should be minimized.

   • True
   • False

   Hint

   Recall the ideal characteristics preferred in amplifiers.

5. 5.

   Given a differential amplifier with a measured differential mode gain of 20 and a common mode gain of 0.5, calculate the common mode rejection ratio (CMRR).

   Hint

   Remind yourself how to find CMRR from the defined gains.

6. 6.

   In a scenario where the common mode gain becomes significantly high, discuss the potential impact on the signal output and suggest troubleshooting strategies.

   Hint

   Consider the factors affecting performance in differential amplifiers.