52.1.4. Lecture – 52

Try these first

1. 1.

   What is the basic configuration of a common base amplifier?

   Hint

   Remember who shares what in the circuit.

2. 2.

   What does it mean for a transistor to be in saturation?

   Hint

   Think of it as being fully open.

3. 3.

   In a common base amplifier, the input is applied to which terminal?

   • Emitter
   • Base
   • Collector

   Hint

   Think about which part is different from common emitter configurations.

4. 4.

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

   • True
   • False

   Hint

   Remember the characteristics that define impedance in amplifiers.

5. 5.

   Given a common base amplifier with a supply voltage of 10V, resistance values for biasing of 20kΩ each, and a β of 200, calculate the maximum output swing based on your earlier lessons.

   Hint

   Focus on biasing effects and saturation thresholds for precise swing limits.

6. 6.

   For a common gate amplifier, derive the current gain knowing the input current is 0.5mA and the output current is 4mA. Verify it mathematically.

   Hint

   Map out the relationships between input and output currents carefully.