30.1.3. Calculating Gain and Other Parameters

Try these first

1. 1.

   Define voltage gain in the context of a common emitter amplifier.

   Hint

   Think about how output voltage is determined based on input voltage.

2. 2.

   What does transconductance (g_m) measure?

   Hint

   It relates to the operation of the transistor's collector current.

3. 3.

   What is the formula used to calculate voltage gain in a common emitter amplifier?

   • A_v = R_C / R_E
   • A_v = g_m × R_C
   • A_v = I_C × V_CC

   Hint

   Consider the key parameters that dictate how voltage gain is achieved.

4. 4.

   Is it true that increasing I_C increases the voltage gain?

   • True
   • False

   Hint

   Focus on the relationship between current and gain metrics.

5. 5.

   Design a common emitter amplifier that meets the following specifications: A voltage gain of 50, supply voltage of 15 V, and a minimum output swing of ± 5 V. Calculate necessary component values.

   Hint

   Analyze the required gain and set up your equations accordingly.

6. 6.

   Calculate the maximum power dissipation in a CE amplifier with a maximum I_C of 2 mA and a supply voltage of 12V, and discuss potential design implications if power dissipation exceeds recommended levels.

   Hint

   Consider checking the thermal characteristics of your devices.