4.6.3. Future Topics: BJT and MOS Circuits

Try these first

1. 1.

   What is the main function of a diode?

   Hint

   Think about how water flows through a one-way valve.

2. 2.

   What happens when the voltage applied to a diode is below the cut-in voltage?

   Hint

   Consider the diode as a gate that only opens at a certain voltage.

3. 3.

   What is the behavior of a diode when the voltage is below the cut-in voltage?

   • True
   • False

   Hint

   Recall the condition for current flow.

4. 4.

   In a diode's I-V characteristic, what happens in the ON region when the input voltage exceeds cut-in voltage?

   • The current remains zero
   • The current exponentially increases
   • The current decreases

   Hint

   Focus on the exponential nature of the I-V relationship.

5. 5.

   Given a diode with an I-V characteristic reaching 1V, calculate the expected output voltage if the input is 3V and the voltage drop across a resistor is 1V when the diode is ON.

   Hint

   Deduct the resistor's influence after identifying the diode's conducting state.

6. 6.

   Design a circuit with a diode and a resistor enough to establish a working AC signal overlaid on a DC bias of 2V. What considerations do you have for the cut-in voltage?

   Hint

   Consider the maximum AC signal’s peak to keep the overall characteristics linear.