43.4.1. Attenuation Factor Due to Loading

Try these first

1. 1.

   What is the purpose of cascading amplifiers?

   Hint

   Think about amplification.

2. 2.

   Define the attenuation factor.

   Hint

   Consider loading effects.

3. 3.

   What happens to the overall gain when cascaded amplifiers are loaded?

   • It increases
   • It stays the same
   • It decreases

   Hint

   Think about voltage dividers.

4. 4.

   True or False: Using a buffer can eliminate loading effects.

   • True
   • False

   Hint

   Consider the purpose of buffers.

5. 5.

   Design a two-stage amplifier with specified gains but ensure the cascaded gain meets target specifications despite loading effects. Calculate required buffer characteristics.

   Hint

   Apply attenuation equations carefully.

6. 6.

   If the first amplifier has a gain of 12 and the second has 8, while the output resistance of the first is 2kΩ and the input resistance of the second is 3kΩ, calculate the net gain including attenuation.

   Hint

   Break it down to verify each part of the calculation.