4.4.3. Signal with DC Voltage

Try these first

1. 1.

   Define the cut-in voltage for silicon diodes.

   Hint

   Think of the voltage at which the diode starts conducting substantially.

2. 2.

   What is the reverse saturation current?

   Hint

   Consider the current through a diode when no forward voltage is applied.

3. 3.

   What is the cut-in voltage of a silicon diode?

   • 0.3V
   • 0.5V
   • 0.6V
   • 0.8V

   Hint

   Consider the typical voltage required for silicon diodes to start conducting.

4. 4.

   The output of a diode circuit will be equal to input only when the diode is in which state?

   • True
   • False

   Hint

   Think about when the diode's operational state off allows equal voltage across terminals.

5. 5.

   You have a diode circuit with a DC voltage of 3V and an AC signal of 1.5V amplitude. What is the expected output voltage if the diode's cut-in voltage is 0.7V?

   Hint

   Think about the condition of the diode during the maximum swing of the AC signal.

6. 6.

   If the resistance is very high for the diode in OFF state, why is this significant for circuit analysis?

   Hint

   Consider what happens when there is minimal current in a voltage divider.