43.2. Implementation Configurations

Try these first

1. 1.

   What should the output resistance be for a voltage mode buffer?

   Hint

   Think about why low output resistance would be advantageous in an amplifier.

2. 2.

   What is the input capacitance requirement for voltage mode buffers?

   Hint

   Consider how capacitance could affect frequencies in a circuit.

3. 3.

   What should the output resistance be for a voltage mode buffer?

   • High
   • Low
   • Variable

   Hint

   Consider what happens to the signal if the resistance is high.

4. 4.

   True or False: For current mode buffers, the input resistance should be high.

   • True
   • False

   Hint

   Think about the nature of current flow in a buffer.

5. 5.

   Design a voltage mode buffer circuit using a common collector configuration and explain how it fulfills the resistance requirements.

   Hint

   Think about how the transistor's connections lead to these characteristics.

6. 6.

   Evaluate the performance of a current mode buffer in a specific application where input current is critical. What configurations could be used, and why?

   Hint

   Consider the impact of input and output characteristics on the application.