39.1. Frequency Response of CE and CS Amplifiers (Contd.) (Part B)

Try these first

1. 1.

   What is the definition of cutoff frequency?

   Hint

   Think about how amplifiers respond to high frequency signals.

2. 2.

   Identify what a pole in an amplifier's frequency response signifies.

   Hint

   Remember how points can cause a fall in response on a graph.

3. 3.

   What does a zero in a Bode plot signify?

   • Increase in gain
   • Decrease in gain
   • Unchanged gain

   Hint

   Think about where the gain rises on a plot.

4. 4.

   True or False: The pole in an amplifier extends the high frequency response.

   • True
   • False

   Hint

   Consider how poles affect amplifier performance.

5. 5.

   Consider a CE amplifier with R = 1kΩ and C = 10µF. Derive the cutoff frequency and plot the Bode plot. What implications do these have for signal processing?

   Hint

   Using R and C, derive RC time constants and relate them back to the overall performance.

6. 6.

   You're given a CS amplifier with a varying load capacitance of 50pF linked to a resistance. How does this load capacitor interact with the existing circuit to influence overall gain?

   Hint

   Examine how load impacts gain calculations based on your earlier lessons on capacitive effects.