43.6. Use of Buffers in Cascading

Try these first

1. 1.

   What is the primary purpose of cascading amplifiers?

   Hint

   Think about why we connect multiple amplifiers in a sequence.

2. 2.

   What effect do buffers have in amplifier circuits?

   Hint

   Consider the basic function of buffers in electronic circuits.

3. 3.

   What happens to the gain when cascading amplifiers?

   • Increase linearly
   • May decrease due to loading
   • Remain constant

   Hint

   Recall the interaction between stages.

4. 4.

   Using a buffer between cascaded amplifiers improves:

   • True
   • False

   Hint

   Think about the function of buffers in amplifiers.

5. 5.

   Design a circuit with two cascaded CE amplifiers and a buffer. Present the schematic and explain the considerations in your design.

   Hint

   Think about how the impedance will affect the signal.

6. 6.

   Analyze the effects of not using buffers in a cascaded amplifier setup that has a significant gain drop. What design flaws might cause this?

   Hint

   Reflect on the role of input and output resistance.