29.2.2. Input and Output Resistance

Try these first

1. 1.

   What is the input resistance in a CE amplifier with a base resistance of 1 kΩ and emitter resistance of 1.3 kΩ?

   Hint

   Use 1/(1/R_B + 1/r_π) for parallel resistance.

2. 2.

   Define output resistance in common emitter amplifiers.

   Hint

   Think about what influences the current delivery at the output.

3. 3.

   What does the input resistance of a Common Emitter Amplifier typically reflect?

   • Power Transfer
   • Signal Reception
   • Voltage Output

   Hint

   Think about its interaction with the input source.

4. 4.

   True or False: A higher output resistance improves power transfer to the next stage.

   • True
   • False

   Hint

   Remember the relationship between resistance and current flow.

5. 5.

   Design a common emitter amplifier circuit to achieve a specific voltage gain of -100. Discuss how input and output resistance considerations influence your design choices.

   Hint

   Relate gain to collector resistance and transconductance.

6. 6.

   A specific amp design requires high input resistance and low output resistance. Propose a configuration and justify your choice.

   Hint

   Think about how buffers function in circuit designs.