44.1.3. Practical Circuit Considerations

Try these first

1. 1.

   Define output resistance in the context of amplifiers.

   Hint

   Think about the load and its relationship with the amplifier.

2. 2.

   What does the term input capacitance refer to?

   Hint

   Consider what components might affect the input side of an amplifier.

3. 3.

   What is the output resistance of a common collector amplifier generally considered?

   • High
   • Low
   • Medium

   Hint

   Think about why output resistance is important in buffering.

4. 4.

   True or False: A high input capacitance is preferred in voltage buffer applications.

   • True
   • False

   Hint

   Recall the implications of increased capacitance in circuits.

5. 5.

   In an amplifier circuit, if the voltage gain is 0.95, find the adjusted effective capacitance contribution according to Miller's theorem, given that C_gs=10pF.

   Hint

   Use the formula for capacitance adjustment discussed earlier.

6. 6.

   If you have a common collector amplifier and you want to determine its input resistance with an effective load of 50 kΩ and transconductance of 5 mS, what transform would you use?

   Hint

   Remember the relationship between load and how input resistance is affected by other parameters.