58.2.5. Final Bandwidth Summary and Comparison

Try these first

1. 1.

   What is the primary function of a common emitter stage?

   Hint

   Think about voltage amplification.

2. 2.

   Define bandwidth in the context of amplifiers.

   Hint

   Look for the frequency range.

3. 3.

   What is the primary increased benefit of adding a common collector stage?

   • Increase gain
   • Increase input resistance
   • Decrease bandwidth

   Hint

   Think about what CC stages are known for.

4. 4.

   True or False: The addition of a CC stage reduces the overall gain significantly.

   • True
   • False

   Hint

   Recall the effects of CC stages.

5. 5.

   Analyze an amplifier that combines a CE stage followed by CC. If the initial gain is 250 and the CC addition reduces it by 10% while dramatically increasing bandwidth from 500 kHz to 10 MHz, discuss the overall impact on signal processing.

   Hint

   Consider how trade-offs affect function.

6. 6.

   Given the original cutoff frequency of a CE amplifier is 513 kHz, and adding a CC stage brings it to 10 MHz, calculate the factor of increase in bandwidth and discuss its significance.

   Hint

   Think of the frequency as a range that can be expanded.