29.1. Common Emitter Amplifier (Contd.)

Try these first

1. 1.

   What is the main purpose of a common emitter amplifier?

   Hint

   Consider what amplifiers do in a circuit.

2. 2.

   What does transconductance (g_m) indicate?

   Hint

   Think about how input voltage influences output current.

3. 3.

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

   • A = g_m * R_C
   • A = -g_m * R_C
   • A = g_m + R_C

   Hint

   Consider how gain is derived mathematically.

4. 4.

   True or False: The output swing is unaffected by the amplifier's stability.

   • True
   • False

   Hint

   Think about the constraints on output signal variability.

5. 5.

   Design a common emitter amplifier that maintains distortion levels below a certain limit, considering power dissipation and temperature effects.

   Hint

   Pay attention to the specifications provided by the transistor manufacturer.

6. 6.

   Given that a certain common emitter amplifier has an input resistance of 1.3 kΩ and an output resistance of 3.3 kΩ, calculate the voltage gain assuming a collector current of 5 mA.

   Hint

   Consider what output resistance you might use in addition to the collector current.