52.1.5. Common Base and Common Gate Amplifiers (Contd.): Numerical Examples (Part B)

Try these first

1. 1.

   What is the main function of a common base amplifier?

   Hint

   Think about its primary use in amplifying input signals.

2. 2.

   Define transconductance (g_m).

   Hint

   Consider the relationship between input voltage and output current.

3. 3.

   What is the primary role of a common base amplifier?

   • Voltage Amplifier
   • Current Amplifier
   • Power Amplifier

   Hint

   Consider its usage in electronic circuits.

4. 4.

   True or False: The output swing in a common base amplifier can vary significantly depending on the input signal.

   • True
   • False

   Hint

   Reflect on maximum output and input correlations.

5. 5.

   Given a common base amplifier with V_dd = 12V, R_A = 100kΩ, and R_B = 100kΩ, derive the emitter current if V_BE is 0.7V, and discuss the implications of this setup.

   Hint

   Use Ohm’s law and the rules for connecting these resistances.

6. 6.

   Analyze a BJT circuit and determine its effective output swing when subjected to a sinusoidal input; include any distortion considerations.

   Hint

   Think through the AC responses and how they relate to DC biases.