22.1.4. Modelling of Voltage Amplifiers

Try these first

1. 1.

   Define voltage amplifier.

   Hint

   Think about what amplifiers do.

2. 2.

   What does the term "gain" in amplifiers refer to?

   Hint

   Consider what happens to the voltage.

3. 3.

   What is a voltage amplifier?

   • A device that increases current
   • A device that increases voltage
   • A device that decreases voltage

   Hint

   Remember what amplifiers do.

4. 4.

   True or False: Output resistance affects how voltage appears at the output.

   • True
   • False

   Hint

   Consider the relationship between output and connected loads.

5. 5.

   You are tasked with designing a two-stage voltage amplifier. Given specific voltage gains for each stage, calculate the total gain and ascertain the potential loading effects.

   Hint

   Remember the cascading gain must consider each output resistance.

6. 6.

   Illustrate how varying the load resistance at an output can affect the voltage output signal in an amplifier. Provide numerical examples with calculations.

   Hint

   Utilize the concept of potential divider to compute outcomes.