25.2.2. Mapping Small Signal Model to Voltage Amplifier

Try these first

1. 1.

   What happens to capacitors during small signal analysis?

   Hint

   Think about the AC signals versus DC signals.

2. 2.

   Define voltage gain.

   Hint

   How do we express output relative to input?

3. 3.

   What does the small signal model allow us to do in amplifier design?

   • Simplify calculations
   • Increase input resistance
   • Decrease output voltage

   Hint

   Think about why we want a smaller focus in analysis.

4. 4.

   True or False: The voltage gain of a CE amplifier is always positive.

   • True
   • False

   Hint

   Consider whether the output maintains the same phase as the input.

5. 5.

   Given a CE amplifier with specific parameters, derive the small signal voltage gain when the input voltage changes with a predefined frequency.

   Hint

   Factor in the parameters governing gain at low vs. high frequencies.

6. 6.

   Analyze what happens when the operating point of the CE amplifier is shifted due to an increase in temperature and how it might affect signal distortion in practical applications.

   Hint

   Consider how the shift can influence both the upper and lower limits of signal amplitude.