30.1.1. Design Guidelines (Part A)

Try these first

1. 1.

   What is a common emitter amplifier?

   Hint

   Think about how BJTs operate.

2. 2.

   Define quiescent current (IC).

   Hint

   Consider the state of the device without any active signal.

3. 3.

   What is the primary purpose of a coupling capacitor in a common emitter amplifier?

   • To boost the output signal
   • To connect stages while blocking DC
   • To adjust voltage levels

   Hint

   Remember the function of coupling in circuits.

4. 4.

   True or False: The quiescent current (IC) affects the total power dissipation in a transistor.

   • True
   • False

   Hint

   Consider how current and voltage relate in power calculations.

5. 5.

   Design a common emitter amplifier with specific gain requirements, considering the constraints of power dissipation and output swing. Detail the steps taken in your design process, including the calculations for all biasing resistors and coupling capacitors.

   Hint

   Start with identifying all parameters and resolve them systematically.

6. 6.

   For a common emitter amplifier with a supply voltage of 15V and a target output swing of 8V, calculate the appropriate biasing resistors. Assuming IC = 2mA, find the necessary resistance values.

   Hint

   Consider the voltage drop across each component in your solution.