43.2.1. Concepts to be Covered

Try these first

1. 1.

   What do we expect the overall gain to be when cascading two identical CE amplifiers?

   Hint

   Remember the formula for gain in cascaded systems.

2. 2.

   What alteration occurs in the frequency response of cascaded amplifiers?

   Hint

   Think of loading effects and frequency response definition.

3. 3.

   What is the expected overall gain when cascading two amplifiers with gains of 5 each?

   • 5
   • 10
   • 25

   Hint

   Think of multiplication of gains in cascading.

4. 4.

   True or False: Cascading amplifiers always leads to an increase in bandwidth.

   • True
   • False

   Hint

   Reflect if cascading changes inputs.

5. 5.

   Explain how using a buffer can virtually eliminate gain attenuation while cascading amplifiers.

   Hint

   Focus on the principles of impedance and load effects.

6. 6.

   Given two amplifiers with gains of 12 and 8, and a loading resistance of 3kΩ from the first to the second, calculate the actual output voltage if the first stage outputs 2V.

   Hint

   Use voltage division principles to apply the loading effect.