75.2. Overview of Differential Amplifier

Try these first

1. 1.

   What is a differential amplifier?

   Hint

   Think about what it does with two input signals.

2. 2.

   Name one application of a differential amplifier.

   Hint

   Consider where you might need signal amplification.

3. 3.

   What is the primary function of a differential amplifier?

   • To amplify a single input signal
   • To amplify the difference between two input signals
   • To filter signals
   • To convert AC to DC

   Hint

   Think about its name and purpose.

4. 4.

   True or False: A differential amplifier works best with identical input signals.

   • True
   • False

   Hint

   What happens when the signals are the same?

5. 5.

   Describe how you would implement a differential amplifier using both BJT and MOSFET transistors. What specifications would you choose and why?

   Hint

   Consider their characteristics in terms of gain and application.

6. 6.

   Given a circuit diagram of a differential amplifier, how would you calculate the differential mode and common mode gains if provided with all necessary components values?

   Hint

   Refer back to the definitions of each type of gain.