24.1.1. Common Emitter Amplifier (Part A)

Try these first

1. 1.

   What is the primary function of a CE amplifier?

   Hint

   Think of the amplifier's major role.

2. 2.

   Where should the input and output of a CE amplifier be connected?

   Hint

   Recall the connection points.

3. 3.

   What is the primary function of a Common Emitter Amplifier?

   • To amplify AC signals
   • To amplify only DC signals
   • To rectify signals

   Hint

   Focus on what type of signals the CE amplifier is designed for.

4. 4.

   True or False? Coupling capacitors are used in CE amplifiers to allow DC signals to pass through.

   • True
   • False

   Hint

   What do capacitors do with different signals?

5. 5.

   Design a Common Emitter Amplifier that compensates for temperature effects on beta. Suggest an alternative biasing scheme that enhances stability.

   Hint

   Think about how feedback could help in maintaining the operating point.

6. 6.

   Given a BJT with a beta of 100, calculate the input and output signals if the AC input voltage is 20mV. What would be the output voltage, assuming Vcc is 12V and appropriate resistances are in place?

   Hint

   Ensure to derive input-output relationships based on small signal approximations.