23.2.2. Department of Electronics and Electrical Communication Engineering

Try these first

1. 1.

   What is a current amplifier?

   Hint

   Consider the type of signals managed by the amplifier.

2. 2.

   What does unloaded current gain indicate?

   Hint

   Think about testing an amplifier with no devices connected.

3. 3.

   What does an unloaded current gain of 5 mean?

   • The output current is five times the input current
   • The input current is five times the output current
   • It has no significance

   Hint

   Think about how gain changes the input and output relation.

4. 4.

   True or False: A current amplifier can also amplify voltage.

   • True
   • False

   Hint

   Remember, each amplifier type serves a specific purpose.

5. 5.

   Design and describe a circuit featuring both a current amplifier and a transimpedance amplifier. Explain how the output of the first amplifier drives the second.

   Hint

   Remember the signal flow from current to voltage!

6. 6.

   A current amplifier has an internal resistance of 150 ohms and is connected to a load of 450 ohms. What is the effective current gain considering loading effects?

   Hint

   Consider resistance in parallel and the impact on current transfer.