29.5. Summary of Important Concepts

Try these first

1. 1.

   Define voltage gain and its significance in an amplifier.

   Hint

   Think about the ratio of output to input voltage.

2. 2.

   What is transconductance, and how is it calculated?

   Hint

   Use thermal voltage for calculations.

3. 3.

   What is a typical value for transconductance (g_m)?

   • 0.026
   • 26
   • 200

   Hint

   Think about typical thermal voltages.

4. 4.

   True or False: Higher power dissipation improves amplifier reliability.

   • True
   • False

   Hint

   Consider the implications on temperature rose.

5. 5.

   Consider a CE amplifier that has an input resistance of 1kΩ and an output resistance of 10kΩ. If the input signal is 0.5V, calculate the output voltage considering a gain of -20.

   Hint

   Apply the voltage gain formula.

6. 6.

   An amplifier experiences a significant temperature rise leading to failure. Discuss steps you would take to redesign to mitigate power dissipation issues.

   Hint

   Consider material and physical changes in your design.