50.1.3. Relationship between Input and Output Currents

Try these first

1. 1.

   What is the main characteristic of a common base amplifier?

   Hint

   Think about how it manages AC and DC signals.

2. 2.

   What happens to the current gain in a common base amplifier?

   Hint

   Consider the role of current in amplification.

3. 3.

   What is the current gain in a common base configuration typically less than?

   • 1
   • 2
   • 0.5

   Hint

   Recall the characteristics of amplification.

4. 4.

   True or False: The input impedance of a common base amplifier is high.

   • True
   • False

   Hint

   Remember the resistance properties discussed.

5. 5.

   A common base amplifier receives a 20 mA signal at the input and produces an output of 18.5 mA. Calculate the current gain and discuss its usability in signal buffering.

   Hint

   Use the current gain formula to guide your calculations.

6. 6.

   Describe how varying the load resistance at the output affects a common base amplifier's performance. Provide examples.

   Hint

   Think about impedance interaction and how it affects the circuit's output.