6.5. Input to Output Transfer Characteristic

Try these first

1. 1.

   What is the forward voltage drop of a silicon diode under normal operating conditions?

   Hint

   Think about the typical voltage level when a diode is conducting.

2. 2.

   Define a small-signal equivalent circuit.

   Hint

   Consider what happens to DC values in this type of analysis.

3. 3.

   What is the main disadvantage of using iterative methods for circuit analysis?

   • They are always accurate
   • They can be slow and cumbersome
   • They require less knowledge of the circuit

   Hint

   Consider what happens when you repeat guesses frequently.

4. 4.

   True or False: Small-signal equivalent circuits retain the DC voltage in their calculations.

   • True
   • False

   Hint

   Think about the purpose of focusing on AC signals.

5. 5.

   A circuit contains a silicon diode with a load of 10 kΩ. Assuming a forward voltage drop of 0.65 V, calculate the circuit current using a practical single-step method.

   Hint

   Don't forget to consider the forward drop from the diode in your calculations.

6. 6.

   Analyze how varying the input AC signal will affect the output voltage in a small-signal model when a DC offset is present.

   Hint

   Consider how an AC signal superimposed on a DC shift would affect the total voltage across the load.