27.8.2. Conclusion and Next Steps

Try these first

1. 1.

   What is voltage gain?

   Hint

   Think of the basic formula involving input and output.

2. 2.

   What is the purpose of the emitter resistor (R_E)?

   Hint

   Consider what happens to the gain if this resistor is too high.

3. 3.

   What factor degrades the gain in a CE amplifier?

   • Emitter Resistor
   • Coupling Capacitor
   • Transistor Type

   Hint

   Consider the role of stabilization vs. gain.

4. 4.

   True or False: The emitter resistor helps to increase the gain in a CE amplifier.

   • True
   • False

   Hint

   Remember its effect from the voltage gain formula.

5. 5.

   A CE amplifier has R_E = 1kΩ and R_C = 4kΩ, calculate the estimated voltage gain.

   Hint

   Consider g_m values in relation to the transistor specifications.

6. 6.

   Design a circuit with a minimum cutoff frequency of 20 Hz, detailing the choice for R_E and capacitor.

   Hint

   Use the known relationship of RC in determining frequency responses.