43.5.2. Upper Cutoff Frequency Considerations

Try these first

1. 1.

   Define cascading in amplifier circuits.

   Hint

   Think about why we combine amplifiers.

2. 2.

   What is the loading effect?

   Hint

   Consider how amplifiers interact when linked.

3. 3.

   What is the main purpose of cascading amplifiers?

   • To reduce gain
   • To increase gain
   • To isolate stages

   Hint

   Think about what cascading means in amplifier theory.

4. 4.

   Does loading affect the upper cutoff frequency in cascaded amplifiers?

   • True
   • False

   Hint

   Think about how two stages alter frequency response.

5. 5.

   You have two CE amplifiers with gains of 20 and 30 dB, respectively. If their loading effect leads to a reduction factor of 0.5, what is the overall gain in dB?

   Hint

   Remember how to convert gain from dB and back.

6. 6.

   If the upper cutoff frequency of a cascaded amplifier system is determined to be 25 kHz due to loading effects, but you desire it to be 50 kHz. What adjustments could be suggested?

   Hint

   Consider the role of buffering and redesigning.