30.2. Power Dissipation and Current

Try these first

1. 1.

   What is the formula for calculating power dissipation in a CEA?

   Hint

   Think about how power relates to voltage and current.

2. 2.

   Why is knowing the quiescent current important?

   Hint

   Consider the thermal aspect of the circuit.

3. 3.

   What is the fundamental formula for power dissipation in a common emitter amplifier?

   • Vcc / IC
   • Vcc × IC
   • Vcc + IC

   Hint

   Look at how power is expressed in terms of voltage and current.

4. 4.

   True or False: The quiescent current does not affect the amplifier's temperature stability.

   • True
   • False

   Hint

   Think about the role of power in thermal management.

5. 5.

   Design a common emitter amplifier with a specified output swing of ±5V while maintaining a power dissipation of no more than 50mW. What parameters need to be considered?

   Hint

   Evaluate how each component influences total power and output swing.

6. 6.

   Given a transistor with beta = 150, calculate the base current if the collector current is set to 10mA. How does this factor into overall circuit design?

   Hint

   Think about the relationship between the base and collector currents.