31.1.3. Circuit Adjustments for Gain

Try these first

1. 1.

   What is the main purpose of a common emitter amplifier?

   Hint

   Think about its role in electronic circuits.

2. 2.

   What factor predominantly influences the output swing of an amplifier?

   Hint

   Recall how output voltage is determined by input and supply.

3. 3.

   What method can be used to increase the gain of a common emitter amplifier beyond its typical limit?

   • A) Increase the supply voltage
   • B) Use multiple amplifiers in sequence
   • C) Bypass all resistors
   • D) Decrease the collector resistor

   Hint

   Think about how connecting stages can impact overall amplification.

4. 4.

   True or False: Resistor values should be ignored completely when designing a circuit for lower gains.

   • True
   • False

   Hint

   Consider how the circuit's behavior changes with different resistor values.

5. 5.

   Design a common emitter amplifier with an output swing of 5V using a V_CC of 12V. Determine resistor values needed to achieve a gain of 20 while ensuring bias point stability.

   Hint

   Consider using the voltage divider rule and resistor configurations to stabilize the bias point.

6. 6.

   Suppose you are designing an amplifier that requires a gain factor of 50. However, doing the typical resistor configuration is providing instability. Propose an alternative layout to meet the gain requirements without losing stability.

   Hint

   Think about how bypassing affects the gain while maintaining the necessary operating point.