54.2. Common Gate Amplifier Analysis

Try these first

1. 1.

   What is the function of a common gate amplifier?

   Hint

   Think about how the input source is connected.

2. 2.

   What does input impedance influence?

   Hint

   Consider the impact on the source.

3. 3.

   What is the purpose of specifying input impedance in amplifier design?

   • To determine the voltage swing
   • To minimize current draw
   • To ensure stable gain

   Hint

   It's about how much current the input draws.

4. 4.

   True or False: Voltage swing can be achieved beyond the power supply limits.

   • True
   • False

   Hint

   Think about circuit limits.

5. 5.

   Design a common gate amplifier circuit with a supply voltage of 15V aiming for an output swing of ±5V. Determine suitable resistor values for maintaining an input impedance of 300Ω.

   Hint

   Calculate the voltage drops needed and ratios to find the desired resistance values.

6. 6.

   Explain how you would adjust a common gate amplifier to handle a sudden increase in input signal without distortion, considering component selection.

   Hint

   Consider how each component behaves under changing load conditions.