27.3.2. Finding Output Resistance

Try these first

1. 1.

   What does gm stand for in the context of amplifiers?

   Hint

   Remember what controls the output based on input voltage changes.

2. 2.

   How does Re impact the gain of the amplifier?

   Hint

   Think about the relationship between gain and additional resistance.

3. 3.

   What is the impact of adding an emitter resistor on voltage gain?

   • Increases gain
   • Decreases gain
   • No effect

   Hint

   Think about how resistors affect voltage drop across the circuit.

4. 4.

   True or False: Output resistance is unaffected by intra-circuit components.

   • True
   • False

   Hint

   Consider how circuit topology affects overall resistance.

5. 5.

   Design an amplifier with a specified gain of -20. If Rio = 10 kΩ, calculate the values for Re needed to maintain stability with varying β.

   Hint

   Consider using ideal values for Rc initially, then assess Re.

6. 6.

   You need to analyze how varying Rc impacts overall gain while having Re fixed at 470 Ω. Discuss your findings.

   Hint

   Employ the gain equation and examine how alterations affect the R factors.