39.1.1. Introduction and Gain Expression

Try these first

1. 1.

   Define gain in the context of amplifiers.

   Hint

   Think about how effective amplifiers are at increasing signal strength.

2. 2.

   What does a pole in amplifier frequency response represent?

   Hint

   It usually marks a transition in the behavior of the amplifier.

3. 3.

   What is the primary function of a bypass capacitor in a CE amplifier?

   • Increase gain
   • Decrease noise
   • Stabilize temperature

   Hint

   Consider the role of capacitors in AC and DC circuits.

4. 4.

   True or False: An increase in the frequency of the input signal results in an infinite gain in an amplifier.

   • True
   • False

   Hint

   What happens to gain at high frequencies?

5. 5.

   Consider a CE amplifier with the following parameters: g = 2 mS, R1 = 10kΩ, R2 = 4kΩ, C = 1μF. Calculate the gain and its frequency response.

   Hint

   Identify your equivalent resistance and substitute values accordingly.

6. 6.

   Design a CE amplifier for an audio application requiring a gain of 50. Which parameters would you select to ensure the frequency response suits audio signals?

   Hint

   Look back at the design guidelines discussed in class.