5.7. Common Gate Amplifier

Try these first

1. 1.

   What is the primary feature of a Common Gate Amplifier?

   Hint

   Think about how it relates to other amplifier types.

2. 2.

   What does the voltage gain formula A_v = g_m R_D mean?

   Hint

   Break down the components of the formula.

3. 3.

   What is the main characteristic of a Common Gate Amplifier?

   • High input impedance
   • Low input impedance
   • Unity gain

   Hint

   Remember the V-I relationship of the input.

4. 4.

   The voltage gain of a CGA is related to which two components?

   Hint

   Consider the formula we reviewed in class.

5. 5.

   Design a Common Gate Amplifier circuit that can amplify a 500 mV input signal to 2V output while ensuring the input signal remains undistorted. Discuss the components required.

   Hint

   Consider the values that affect voltage gain.

6. 6.

   Explain how the CGA can be beneficial in signal processing applications such as radar systems. What factors make it stand out in such applications?

   Hint

   Think about the specific needs of response time in fast signal changes.