2.1. Input Modes

Try these first

1. 1.

   What is differential mode in Op-Amps?

   Hint

   Think about what the Op-Amp is trying to do with the input signals.

2. 2.

   What is common mode in Op-Amps?

   Hint

   What does the Op-Amp ideally output when both inputs are the same?

3. 3.

   What is the characteristic of the differential mode?

   • A. Same voltage at both inputs
   • B. Amplifies voltage difference
   • C. Reduces signal quality

   Hint

   Focus on the purpose of differential operation.

4. 4.

   Is it correct that CMRR measures how well an Op-Amp rejects common-mode signals?

   • True
   • False

   Hint

   Reflect on what the CMRR signifies in operational amplifiers.

5. 5.

   Given an Op-Amp circuit with a common-mode input of 2V and a differential input resulting in a CMRR of 50, compute the expected output voltage when both modes interact.

   Hint

   Combine your knowledge of input interactions and the formula for CMRR.

6. 6.

   Discuss the impact of low CMRR on precision measurement devices and propose a design modification to address this issue.

   Hint

   Consider the implications of common noise in your design.