27.2. Voltage Gain of the Circuit

Try these first

1. 1.

   Define voltage gain in the context of an amplifier.

   Hint

   Think about the relationship between input and output in amplifiers.

2. 2.

   What does the emitter resistance (R_E) do in a circuit?

   Hint

   Consider its impact on circuit performance.

3. 3.

   What is the voltage gain of a common emitter amplifier defined as?

   • Output Voltage/Input Voltage
   • Input Voltage/Output Voltage
   • Collector Resistance/Emitter Resistance

   Hint

   Think about how an amplifier enhances signals.

4. 4.

   True or False: An increase in emitter resistance generally increases the overall gain of an amplifier.

   • True
   • False

   Hint

   Consider the trade-offs of resistance in amplifiers.

5. 5.

   Given a circuit with a transconductance of 25 mS and collector resistance of 5 kΩ, determine the voltage gain if the emitter resistance is 1 kΩ.

   Hint

   Plug in the values carefully into the formula.

6. 6.

   Analyze the effect of increasing emitter resistance on the voltage gain. What phenomenon occurs and why should designers be cautious?

   Hint

   Consider the role of resistance in amplification.