44.2.2. Practical Insights

Try these first

1. 1.

   What is output resistance?

   Hint

   Think about what load means in amplification.

2. 2.

   Define input capacitance.

   Hint

   Consider how amplifiers interact with incoming signals.

3. 3.

   What does low output resistance in an amplifier signify?

   • It reduces signal distortion
   • It allows for more signal power to be delivered
   • It raises input capacitance

   Hint

   Think about power delivered to the load.

4. 4.

   True or False: Input capacitance increases with higher voltage gain in amplifiers.

   • True
   • False

   Hint

   Consider how gain affects capacitance.

5. 5.

   Given a common collector amplifier with a load resistance of 2kΩ, determine the output resistance if the intrinsic output resistance is 200Ω.

   Hint

   Use the formula for parallel resistors to find effective output resistance.

6. 6.

   An amplifier has a voltage gain of 0.85. If the input capacitance is 10nF, what is the contribution to effective input capacitance via Miller's theorem?

   Hint

   Apply Miller's theorem to assess input capacitance scaling.