4.4.2. Input to Output Voltage Analysis

Try these first

1. 1.

   What happens to the current flowing through a diode when the voltage is less than the cut-in voltage?

   Hint

   Think of the diode as a gate that is closed.

2. 2.

   What is the purpose of the reverse saturation current in the context of diodes?

   Hint

   Recall the definition of reverse saturation current.

3. 3.

   What reflects the I-V characteristics of a diode?

   • Linear dependence
   • Exponential dependence
   • Constant dependence

   Hint

   Consider how current behaves as voltage increases.

4. 4.

   When the diode is OFF, what is the output voltage?

   • True
   • False

   Hint

   Think about the state of the diode and its effect on the voltage.

5. 5.

   In a circuit with a silicon diode, calculate the output voltage when the input voltage is 1.5V given that the cut-in voltage is 0.7V and the series resistor is 1kΩ.

   Hint

   Don't forget to consider the on-resistance and how it affects the voltage drop.

6. 6.

   Design a diode clipping circuit using a 1N4148 diode that clips the negative portion of an input sine wave of amplitude 1V. Determine the conditions for successful operation.

   Hint

   Ensure your DC bias accounts for the clipping behavior above the cut-in voltage.