74.6.2. Next Steps in Implementation

Try these first

1. 1.

   What is a differential amplifier?

   Hint

   Think about what it does with two input signals.

2. 2.

   What does common mode rejection mean?

   Hint

   Consider why we want to eliminate certain signals.

3. 3.

   What is the main purpose of a differential amplifier?

   • To amplify a single signal
   • To amplify the difference between two signals
   • To eliminate all signals

   Hint

   Focus on what the amplifier is supposed to do with two inputs.

4. 4.

   True or False: Operational amplifiers can function as differential amplifiers.

   • True
   • False

   Hint

   Think of the basic definition of op-amps.

5. 5.

   Using the principles of differential amplifiers, explain how you would design a sensor circuit that must operate effectively in a noisy environment.

   Hint

   Consider both the input stage and post-amplification processes.

6. 6.

   Analyze a scenario where a differential amplifier's output is corrupted due to excessive common mode gain. What design optimizations would help mitigate this issue?

   Hint

   Look at how to improve the overall amplifier design.