24.1.9. Output Port of the Circuit

Try these first

1. 1.

   Define a common emitter amplifier.

   Hint

   Think about how the input and output are connected in this amplifier.

2. 2.

   What is the primary purpose of biasing in an amplifier?

   Hint

   Why do we need the transistor to stay in a specific region?

3. 3.

   Where is the input connected in a common emitter amplifier?

   • Collector
   • Base
   • Emitter

   Hint

   Refer to the configuration of the first stage of the amplifier you learned about.

4. 4.

   True or False: Biasing has no effect on the transistor's performance.

   • True
   • False

   Hint

   Consider when we talked about 'stable operation' of the amplifier.

5. 5.

   You have a common emitter amplifier with a beta of 100. If the collector current is measured as 2 mA, calculate the base current and explain what this indicates about biasing.

   Hint

   Use the formula for beta to relate the currents.

6. 6.

   Design a common emitter amplifier circuit that can handle temperature fluctuations of 20°C to 30°C. Explain your component choices.

   Hint

   Consider temperature ratings of components when making choices.