44.2.1. Input Capacitance Considerations

Try these first

1. 1.

   What is the input capacitance in amplifier circuits primarily influenced by?

   Hint

   Think about what electrical components can store charge.

2. 2.

   How does adding a biasing resistor affect input resistance?

   Hint

   It forms a parallel connection with the existing resistance.

3. 3.

   What is the primary factor that influences the input capacitance in amplifiers?

   • Parasitic capacitance
   • Load resistance
   • Output capacitance

   Hint

   Think about what components create capacitance.

4. 4.

   Do common collector amplifiers have high output resistance?

   • True
   • False

   Hint

   Recall what we learned about resistance profiles.

5. 5.

   Design a common drain amplifier circuit with a specified input signal and analyze the resulting input capacitance and voltage gain when a biasing resistor is introduced.

   Hint

   Break down the circuit; remember to apply parallel resistance formulas.

6. 6.

   A common collector amplifier has output resistance and input capacitance defined. If the output is connected to a load with specific capacitance, how will it affect the overall input characteristics?

   Hint

   Focus on the interaction between capacitive elements and voltage gain.