3. Junction Field Effect Transistors (JFETs)

Try these first

1. 1.

   What is a JFET?

   Hint

   Consider how it differs from BJTs.

2. 2.

   What are the two types of JFET?

   Hint

   Think about the type of charge carriers.

3. 3.

   Which type of JFET uses electrons as charge carriers?

   • p-channel
   • n-channel
   • bipolar

   Hint

   Think about the type of semiconductor used.

4. 4.

   True or False: JFETs are current-controlled devices.

   • True
   • False

   Hint

   Remember how JFETs control current.

5. 5.

   You are designing a circuit that requires low power consumption and high input impedance. Would you choose a JFET or a BJT? Justify your choice.

   Hint

   Think about the advantages of each type for specific applications.

6. 6.

   Calculate the drain current for a JFET with IDSS of 10 mA and VGS(off) of -3V when VGS is -1V.

   Hint

   Apply the formula and ensure you correctly substitute the values.