65.1.5. Multi-Transistor Amplifiers: Cascode Amplifier (Contd.) - Numerical Examples

Try these first

1. 1.

   Define a cascode amplifier.

   Hint

   Think about how stacking components can impact performance.

2. 2.

   What is the formula for voltage gain?

   Hint

   It involves small-signal parameters.

3. 3.

   What does a cascode amplifier primarily enhance?

   • Power dissipation
   • Voltage gain
   • Input resistance

   Hint

   Recall the key advantages of this amplifier type.

4. 4.

   True or False: An active load does not impact bandwidth.

   • True
   • False

   Hint

   Think about how different loads can interact with signal frequency.

5. 5.

   If a cascode amplifier has a total capacitance of 200 pF and a voltage gain of -100, what is the resulting effect on bandwidth?

   Hint

   Apply your knowledge of how capacitance impacts frequency.

6. 6.

   Analyze how doubling the active load resistance in a cascode amplifier would affect voltage gain and input capacitance.

   Hint

   Consider both ends of the amplifier's performance.