29.1.1. Numerical Examples (Part B)

Try these first

1. 1.

   What is the relationship between base current and collector current in a CE amplifier?

   Hint

   Consider the definition of the transistor's current gain.

2. 2.

   Calculate the input resistance if r_π = 1.3 kΩ.

   Hint

   Remember the definition of input resistance in a CE configuration.

3. 3.

   What does the voltage gain formula for a CE amplifier look like?

   • A_v = g_m * R_C
   • A_v = -g_m * R_C
   • A_v = g_m / R_C

   Hint

   Recall how the output signal relates to the input signal in terms of phase.

4. 4.

   The input resistance of a CE amplifier is determined primarily by which parameter?

   • True
   • False

   Hint

   Consider the components connected to the input terminal.

5. 5.

   Design a CE amplifier with given specifications on input resistance and desired voltage gain. Include calculation steps.

   Hint

   Separate the gain and resistance calculations for clarity.

6. 6.

   Evaluate the effects on voltage gain if R_C is halved while keeping I_C constant. What trend does this suggest?

   Hint

   Analyze the voltage gain formula under varying load conditions.