40.1. Frequency Response Of CE/ CS Amplifiers Considering High Frequency Models Of BJT And MOSFET (Part A)

Try these first

1. 1.

   What is frequency response in amplifiers?

   Hint

   Consider how signals change with different frequencies.

2. 2.

   Name one capacitance in BJTs that affects frequency response.

   Hint

   Think about the junctions in a BJT.

3. 3.

   What does frequency response indicate in amplifiers?

   • The efficiency of power usage
   • The behavior of output signal versus frequency of input signal
   • The active components used in amplifiers

   Hint

   Think about how amplifiers process different frequencies.

4. 4.

   True or False: Miller's theorem allows us to combine all capacitance effects into one magnitude for analysis.

   • True
   • False

   Hint

   Reflect on the purpose of the theorem.

5. 5.

   Design a frequency response circuit using a CE amplifier model, incorporating C_π and C_µ. Calculate the expected cutoff frequency.

   Hint

   Consider how both capacitances interact with the circuit impedances.

6. 6.

   Critically evaluate a scenario where a designer disregards inherent capacitances in their CE amplifier design. What issues could arise in performance?

   Hint

   Reflect on different frequency inputs and their impacts.