52.3.3. Voltage Gain and Input Impedance

Try these first

1. 1.

   What is the basic function of a common base amplifier?

   Hint

   Think about what amplifiers generally do.

2. 2.

   What formula is used to calculate the voltage gain?

   Hint

   Consider how output and input voltages relate.

3. 3.

   What does a low input impedance indicate in a common base amplifier?

   • It handles high voltage inputs
   • It is better for current inputs
   • It has high distortion

   Hint

   Think about the types of inputs these amplifiers work best with.

4. 4.

   True or False: The voltage gain of a common base amplifier can be less than 1.

   • True
   • False

   Hint

   Remember how voltage amplification works.

5. 5.

   Design a common base amplifier circuit with a specified input signal and calculate the output voltage while considering input impedances that may cause significant signal loss.

   Hint

   Pay attention to how resistors interact in your circuit!

6. 6.

   Evaluate the impact of temperature variations on the operating point of a common base amplifier and how this might affect performance.

   Hint

   Consider how temperature influences electron mobility.