46.2.1. Small Signal Equivalent Circuit

Try these first

1. 1.

   What is the small signal equivalent circuit used for?

   Hint

   Think about simplifications for AC signal analysis.

2. 2.

   What does a common collector amplifier provide in terms of resistance?

   Hint

   Consider the behavior of the amplifier on connecting different components.

3. 3.

   What is the primary use of a small signal equivalent circuit?

   • To analyze large signals
   • To analyze small AC signals
   • To simulate DC conditions

   Hint

   Think about the nature of the signals being studied.

4. 4.

   True or False: The voltage gain of a common collector amplifier is typically less than one.

   • True
   • False

   Hint

   Reflect on what makes a buffer functional.

5. 5.

   A common collector amplifier has a base current of 20µA and a collector resistor of 15kΩ. Calculate the expected output voltage assuming unity gain.

   Hint

   Reflect on the relationship between base current and collector current.

6. 6.

   If the input capacitance of a common collector amplifier is found to limit its bandwidth to 5kHz, how would increasing the capacitance affect the bandwidth?

   Hint

   Consider how capacitance generally influences frequency response.