50.1. Common Base Configuration

Try these first

1. 1.

   Define current gain in the context of common base configuration.

   Hint

   Think about how much the transistor amplifies the input.

2. 2.

   Explain why we short the output terminal to AC ground during analysis.

   Hint

   Consider the effect of impedance on the circuit behavior.

3. 3.

   What does the common base configuration primarily do?

   • Amplifies voltage
   • Acts as a current buffer
   • Filters noise

   Hint

   Think about its input-output current characteristics.

4. 4.

   True or False: The current gain in common base configuration is always greater than 1.

   • True
   • False

   Hint

   Consider the definition of gain and its typical values.

5. 5.

   Given that the input current is 10 mA and the output current you measure is 9.8 mA, calculate the current gain and discuss its significance.

   Hint

   Ensure you divide appropriate values from the given measurements.

6. 6.

   If a common base configuration has a transconductance (g_m) of 2 mA/V and an emitter voltage of 3V, what would be the output current?

   Hint

   Use the provided transconductance value and the voltage correctly in the formula.