45.2. Common Collector Amplifier Analysis

Try these first

1. 1.

   What is the typical voltage gain of a common collector amplifier?

   Hint

   Think about its function as a buffer.

2. 2.

   Why do we need high input impedance in amplifiers?

   Hint

   Consider the effects of connecting devices together.

3. 3.

   What is the basic function of a common collector amplifier?

   • To amplify voltage
   • To isolate stages
   • To produce high output power

   Hint

   Think about its primary characteristics.

4. 4.

   True or False: The voltage gain of a common collector amplifier can be significantly greater than 1.

   • True
   • False

   Hint

   Recall the voltage gain characteristic.

5. 5.

   You have a common collector amplifier with an output resistance of 100 ohms and a load resistance of 500 ohms. Calculate the output voltage if the input voltage is 5V. Assume voltage gain approximately 1.

   Hint

   Use voltage division principles.

6. 6.

   If you input a high-frequency signal into a common collector amplifier where C_μ affects the gain, how would you approximate this effect on the output impedance?

   Hint

   Connect behavior of capacitance at high frequencies.