74.6.1. Overview of Topics Covered

Try these first

1. 1.

   What is the primary function of a differential amplifier?

   Hint

   Think about what happens when two signals are fed into it.

2. 2.

   Define common mode signal.

   Hint

   It's the unwanted noise that the amplifier targets to suppress.

3. 3.

   What is the main purpose of a differential amplifier?

   • To amplify only common mode signals
   • To amplify the difference between two input signals
   • To output only single-ended signals

   Hint

   Think about the amplifier's primary function!

4. 4.

   True or False: Differential amplifiers only work with perfectly matched input signals.

   • True
   • False

   Hint

   Consider the design of differential amplifiers.

5. 5.

   Given two input signals with a known differential voltage, calculate the expected output of a differential amplifier if its gain is known.

   Hint

   Set up the formula before plugging in the numbers.

6. 6.

   Design a simple circuit using a differential amplifier and suggest how to minimize noise in this circuit.

   Hint

   Consider how components are arranged and the environment in which they are used.