44.3.1. Limitations of Common Emitter and Common Source Amplifiers

Try these first

1. 1.

   What is the main limitation faced by cascading common emitter amplifiers?

   Hint

   Consider how connecting multiple amplifiers can affect signal strength.

2. 2.

   What configuration can be used to buffer between two amplifiers?

   Hint

   Think about solutions that help maintain signal quality.

3. 3.

   What is the primary reason for using a buffer between cascaded amplifiers?

   • To increase gain
   • To reduce loading effects
   • To amplify high frequencies

   Hint

   Think about how connecting devices affects their performance.

4. 4.

   True or False: The common collector configuration has low input resistance.

   • True
   • False

   Hint

   Remember what happens to impedance in transistor configurations.

5. 5.

   Design a circuit that includes a common emitter amplifier followed by a common collector. Analyze how the performance characteristics change in comparison to two cascaded common emitter amplifiers.

   Hint

   Check the impact of the buffer on signal integrity.

6. 6.

   Analyze the frequency response of a cascade of common source amplifiers. Determine how changing input capacitance at the second stage affects the frequency response.

   Hint

   Consider how capacitance interacts with resistance in a circuit.