53.3.1. Design for Common Gate Amplifier

Try these first

1. 1.

   Define 'common gate amplifier'.

   Hint

   Think about the terminal connected to both input and output.

2. 2.

   What is the role of a coupling capacitor in the amplifier?

   Hint

   Focus on what signals it filters out.

3. 3.

   What effect does a coupling capacitor have in a common gate amplifier?

   • Blocks AC signals
   • Allows AC signals to pass
   • Increases DC voltage

   Hint

   Think about the types of signals flowing through.

4. 4.

   Removing the coupling capacitor increases input resistance by a factor of:

   • True
   • False

   Hint

   Remember the factor of ten discussed.

5. 5.

   A R60k ohm input resistance is given in a common gate amplifier without a capacitor. Describe the possible effects on performance and signal integrity.

   Hint

   Reflect on factors that can affect the efficiency of circuit performance.

6. 6.

   Calculate the voltage gain of a common gate amplifier if the input and output resistances are affected by missing components. Derive the formula based on the provided parameters.

   Hint

   Start with the fundamental gain equation and modify accordingly.