51.2.1. Effect of Source Resistance on Output Impedance

Try these first

1. 1.

   What is a common base amplifier intended for?

   Hint

   Think about the amplifier's primary function.

2. 2.

   How does source resistance affect voltage gain?

   Hint

   Consider the division of voltage between source resistance and input impedance.

3. 3.

   What is the primary use of a common base amplifier?

   • Voltage amplification
   • Current amplification
   • Power amplification

   Hint

   Think about the main goal of an amplifier.

4. 4.

   If source resistance increases, what happens to the voltage gain?

   • True
   • False

   Hint

   Reflect on voltage division effects.

5. 5.

   A common base amplifier has a collector resistance of 3 kΩ and source resistance of 1 kΩ. If the voltage input is 1V, compute the output voltage and check if it satisfies the condition for a good amplifier.

   Hint

   Use the voltage divider rule.

6. 6.

   Design a common base amplifier circuit considering a source resistance of 50 kΩ and find the parameters that will optimize performance.

   Hint

   Remember the relationships between source resistance, gain, and bandwidth.