41.1.2. Department of Electronics and Electrical Communication Engineering

Try these first

1. 1.

   What does the input resistance in an amplifier indicate?

   Hint

   Think about how it relates to the input signal.

2. 2.

   What is the significance of a capacitor in an amplifier circuit?

   Hint

   Consider their role in coupling.

3. 3.

   What is the primary effect of increased input capacitance in an amplifier?

   • Decreases output resistance
   • Lowers cutoff frequency
   • Increases gain

   Hint

   Think about how capacitors behave with frequency.

4. 4.

   True or False: A zero in a transfer function indicates a frequency where the output is zero.

   • True
   • False

   Hint

   Reflect on the definition of a zero.

5. 5.

   Design a CE amplifier with R1 = 1kΩ, C3 = 10μF, and calculate the expected cutoff frequency given load capacitance of 100pF.

   Hint

   Consider how each component value interplays to amplify the desired frequencies.

6. 6.

   Given R2 = 2kΩ and a given complex RC network, derive the overall transfer function considering various capacitor sizes.

   Hint

   Focus on how different capacitor values affect equivalent resistance.