42.2. Frequency Response Of CE/CS Amplifiers Considering High Frequency Models of BJT and MOSFET (Part C)

Try these first

1. 1.

   What defines the lower cutoff frequency in an amplifier circuit?

   Hint

   Refer to the relationship between R and C.

2. 2.

   What is the Miller effect?

   Hint

   Think about how output capacitance affects the input.

3. 3.

   What is the formula to calculate the lower cutoff frequency?

   • fL = 1/(2πRC)
   • fH = 1/(2πRC)
   • f = RC

   Hint

   Remember the relationship between frequency, resistance, and capacitance.

4. 4.

   The Miller effect primarily affects which aspect of an amplifier?

   • True
   • False

   Hint

   Think about feedback within amplifier circuits.

5. 5.

   Given a BJT amplifier with R1 = 1.5 kΩ, R2 = 3.2 kΩ, and C = 4.7 µF, calculate the lower cutoff frequency.

   Hint

   Combine R1 and R2 to find the equivalent resistance.

6. 6.

   A CS amplifier has an expected mid-frequency gain of 20 but measures lower. Analyze potential causes.

   Hint

   Consider component interactions and their effects.