70.5. Characterizing Differential Amplifier

Try these first

1. 1.

   What is a single-ended amplifier?

   Hint

   Think about how many inputs are involved.

2. 2.

   Define a differential amplifier.

   Hint

   Focus on the number of inputs used.

3. 3.

   What type of amplifier uses a single input with respect to ground?

   • 1. Differential Amplifier
   • 2. Single-ended Amplifier
   • 3. Both

   Hint

   Focus on the number of inputs.

4. 4.

   True or False: Differential amplifiers amplify the average of two signals.

   • True
   • False

   Hint

   Consider how the output is calculated.

5. 5.

   If the output from a differential amplifier is given to be 20V and the differential gain is determined to be 4, what are the possible values of the two input signals?

   Hint

   Think about how to rearrange the output equation.

6. 6.

   You have two signals, V1 = 7V and V2 = 3V. If the common mode gain is observed to be 0.5, what implications does this have for the noise level?

   Hint

   Identify how common mode affects the signals.