59.1.2. Department of Electronics and Electrical Communication Engineering

Try these first

1. 1.

   What is the typical voltage gain formula for a common source amplifier?

   Hint

   Think about how output voltage relates to input voltage.

2. 2.

   Define the term upper cut-off frequency in your own words.

   Hint

   Consider the impact of frequency on amplifier behavior.

3. 3.

   What is the voltage gain of a typical common source amplifier?

   • 1
   • 6
   • 10

   Hint

   Think about the multiplication of parameters to find the gain.

4. 4.

   The upper cut-off frequency indicates the point where the output signal...

   • is maximized
   • is reduced to 70.7% of the maximum

   Hint

   Consider what happens to the signal at that frequency.

5. 5.

   A compound amplifier system consists of a CS amplifier with a 6 dB gain followed by a CD stage. If the CD stage has an input resistance of 10 kΩ, how would you calculate the output resistance and overall bandwidth?

   Hint

   Reflect on how each stage affects output and perform series-parallel resistance calculations.

6. 6.

   Given a common source amplifier with a load capacitance of 100 pF and an output resistance of 3 kΩ, derive the upper cut-off frequency. Determine how the frequency shifts when a CD stage is added.

   Hint

   Understanding the impact of C and R changes in series and parallel configurations is key.