3.4. JFET Biasing and Operating Regions

Try these first

1. 1.

   What happens in the Ohmic region of a JFET?

   Hint

   Think about how it reacts to voltage.

2. 2.

   What is the drain current in the Cut-off region?

   Hint

   What happens to the channel here?

3. 3.

   What characterizes the Ohmic region of a JFET?

   • The JFET behaves like a diode.
   • The JFET behaves like a resistor.
   • The current is zero.

   Hint

   Relate to how resistance behaves.

4. 4.

   In which region does the JFET operate as an amplifier?

   • True
   • False

   Hint

   Consider the application in amplification.

5. 5.

   A JFET is used in an audio amplifier circuit. Describe how you would bias it to operate in the Active region.

   Hint

   Consider the requirements for maintaining output levels.

6. 6.

   Explain the implications of incorrect biasing in the JFET, leading to it remaining in the Cut-off region.

   Hint

   Think about the consequences when a device does not pass current.