25.2.1. Voltage Gain Expression

Try these first

1. 1.

   Define voltage gain in your own words.

   Hint

   Think about how an amplifier works.

2. 2.

   What does the negative sign in A_v = -R_c × β₀ / r_π represent?

   Hint

   Consider the phase relationship between input and output signals.

3. 3.

   What is the formula for calculating voltage gain in a CE amplifier?

   • A_v = R_c / r_π
   • A_v = -R_c × β₀ / r_π
   • A_v = -r_π / R_c

   Hint

   Look back at the primary equations discussed.

4. 4.

   True or False: In a common emitter amplifier, the output signal is in phase with the input signal.

   • True
   • False

   Hint

   Consider the implications of the negative sign in the gain expression.

5. 5.

   How would you design a CE amplifier to achieve a specific voltage gain of -5000? Outline the components and parameters you would adjust.

   Hint

   Consider the relationships between the parameters carefully.

6. 6.

   In a situation where the beta of a transistor increases due to temperature rise, describe a strategy to maintain voltage gain stability within a CE amplifier schematic.

   Hint

   Think about how feedback loops affect amplifier performance.