43.1.1. Introduction

Try these first

1. 1.

   What is the primary function of a Common Emitter amplifier?

   Hint

   Think about what amplifiers do.

2. 2.

   What does cascading of amplifiers refer to?

   Hint

   Consider the series circuit connections!

3. 3.

   What happens to the gain when two Common Emitter amplifiers are cascaded?

   • Gain increases significantly
   • Gain decreases
   • Gain remains unchanged

   Hint

   Think about how the output of the first stage interacts with the input of the second stage.

4. 4.

   True or False: Cascading amplifiers always results in an increase of the bandwidth.

   • True
   • False

   Hint

   Consider the behavior of frequency responses for individual amplifiers.

5. 5.

   Given two amplifiers with gains of 10 and 5 respectively, what is the expected output gain when cascading them, considering the loading effect factors?

   Hint

   Consider how the gain of the first affects the input of the second.

6. 6.

   Analyze how the upper cutoff frequency of a cascaded amplifier setup is influenced by the capacitive load and resistance configurations. What changes when a buffer is employed?

   Hint

   Think about how buffers can decouple impedance.