37.1.1. Introduction

Try these first

1. 1.

   What does a common source amplifier do?

   Hint

   Consider the primary function of amplifiers.

2. 2.

   What is the purpose of the coupling capacitor in an amplifier?

   Hint

   Think about signal types.

3. 3.

   What does the common-source amplifier primarily amplify?

   • Current
   • Voltage
   • Power

   Hint

   Consider the main function of an amplifier.

4. 4.

   True or False: The lower cutoff frequency is related to the C-R circuit configuration.

   • True
   • False

   Hint

   Think about how circuits are defined by their components.

5. 5.

   A common-source amplifier using a JFET has a transconductance of 5 mS and an input resistance of 10 kΩ. What is the expected upper cutoff frequency if the feedback capacitor is 10 nF?

   Hint

   Use the cutoff frequency formula considering the feedback capacitor.

6. 6.

   Explain why the frequency response of an amplifier is essential when designing amplifying circuits.

   Hint

   Think about the relationship of circuits and real-world signals.