49.1.3. Basic Operation of Common Base and Common Gate Amplifiers

Try these first

1. 1.

   What is the primary use of common base amplifiers?

   Hint

   Think of its role in analog signal handling.

2. 2.

   Which transistor configuration uses BJTs?

   Hint

   Recall the connection: BJT with base common.

3. 3.

   What is the purpose of biasing in an amplifier?

   • To enhance voltage gain
   • To set the operating point
   • To increase input impedance

   Hint

   Consider the impact of DC on AC signals.

4. 4.

   True or False: Common base amplifiers have high input impedance.

   • True
   • False

   Hint

   Think about how they interact with signal sources.

5. 5.

   Design a Common Base amplifier for a specific current amplification factor and calculate biasing requirements.

   Hint

   You may refer to standard BJT datasheets for detailed parameters.

6. 6.

   Analyze the impact of varying input signals on the voltage gain of a common gate amplifier.

   Hint

   Factor in transconductance variations from the datasheet!