75.2.3. Realization of Differential Amplifier

Try these first

1. 1.

   Define a differential amplifier.

   Hint

   Think about its function in an electrical circuit.

2. 2.

   What is common mode gain?

   Hint

   Consider a situation where both channels receive identical input.

3. 3.

   What is a differential amplifier primarily used for?

   • Amplifying both signals equally
   • Amplifying the difference between two signals
   • Rejection of all signals

   Hint

   Remember its core purpose in amplifying small signals.

4. 4.

   Is common mode gain desirable to be high in a differential amplifier?

   • True
   • False

   Hint

   Think about the noise levels that should be eliminated.

5. 5.

   Given a differential amplifier with an output voltage difference of 3V and 1V, calculate the differential gain if the input voltage is 2V.

   Hint

   Remember the formula for calculating differential gain.

6. 6.

   Design a differential amplifier circuit using two BJTs and explain the role of each component in achieving desired amplification.

   Hint

   Think about how each component contributes to the overall function of the amplifier.