64.5. Input Capacitance and Frequency Response

Try these first

1. 1.

   What is input capacitance and why is it important?

   Hint

   Consider the time it takes for circuit response to change with input.

2. 2.

   Define the Miller effect in amplifier circuits.

   Hint

   Think about how amplifiers behave as gain changes.

3. 3.

   What effect does increasing input capacitance have on an amplifier?

   • Increases bandwidth
   • Decreases gain
   • Reduces upper cutoff frequency

   Hint

   Consider how different values affect performance.

4. 4.

   The Miller effect primarily affects which of the following?

   • True
   • False

   Hint

   What does gain do to input characteristics?

5. 5.

   If you have a cascode amplifier with an input capacitance of 1035 pF and a load resistance of 10 MΩ, calculate the upper cutoff frequency.

   Hint

   Remember your frequency response equations.

6. 6.

   Discuss how you would design a cascode amplifier targeting high gain without significantly impacting bandwidth.

   Hint

   Reflect on past design principles and circuit behavior.