61.2. Circuit Analysis

Try these first

1. 1.

   What does the term 'cascode amplifier' refer to?

   Hint

   Think about the layers of transistors.

2. 2.

   Define output impedance.

   Hint

   It's what you 'see' looking into the output.

3. 3.

   What is the primary purpose of using a cascode amplifier?

   • Increase gain
   • Decrease bandwidth
   • Higher output impedance

   Hint

   Focus on impedance!

4. 4.

   True or False: Input capacitance in a cascode amplifier is higher than that in a standard CE amplifier.

   • True
   • False

   Hint

   Think about gain and capacitance relations.

5. 5.

   Design a cascode amplifier for a given frequency response and analyze its performance in terms of input and output impedance.

   Hint

   Start by calculating individual transistor characteristics.

6. 6.

   Given a set of load conditions, predict how altering output impedance will affect the circuit's behavior.

   Hint

   Think about how load affects an amplifier's output.