13.2.2 Exploring field-effect transistors (FETs)

• What is the primary difference between FETs and BJTs in terms of control type?

  Voltage-controlled vs. current-controlled
• FETs have lower power consumption compared to BJTs.


  True
• In a JFET, the gate structure is a p-n junction
• What type of control is used in FETs?

  Voltage-controlled
• Match the FET type with its gate structure:

  JFET ↔️ p-n junction

  MOSFET ↔️ Metal-oxide-semiconductor
• What are the three main terminals of a field-effect transistor (FET)?

  Source, Gate, Drain
• What are the two primary types of field-effect transistors (FETs)?

  JFET and MOSFET
• In which type of circuits are JFETs more commonly used?

  Analog circuits
• Order the steps in the operation of a JFET when increasing reverse bias at the gate.

  1️⃣ Reverse bias increases

  2️⃣ Depletion region widens

  3️⃣ Channel narrows

  4️⃣ Current flow reduces
• What is the key difference in gate control between JFETs and MOSFETs?

  Depletion vs Enhancement/Depletion
• FETs have lower power consumption compared to BJTs.


  True
• What type of gate does a MOSFET have?

  Metal-oxide-semiconductor
• What are the two types of control available in MOSFETs?

  Enhancement and Depletion
• Increasing the reverse bias at the gate in a JFET reduces current flow.


  True
• What is the input impedance of a MOSFET compared to a JFET?

  Higher
• Match the FET characteristic with its correct description:

  Transconductance ↔️ Drain current change with gate voltage

  Input Impedance ↔️ Lower in JFETs, higher in MOSFETs

  Switching Speed ↔️ Faster in MOSFETs
• JFETs are commonly used in analog circuits due to their high input impedance
• Why are MOSFETs preferred in digital logic gates over JFETs?

  Faster switching speeds
• What is the third terminal in a FET called?

  Drain
• What are the two primary types of FETs?

  JFETs and MOSFETs
• Match the FET type with its characteristic feature:

  JFET ↔️ Analog circuits

  MOSFET ↔️ Digital circuits
• Which terminal in a FET controls the channel conductivity?

  Gate
• MOSFETs generally have higher input impedance
• The gate of an FET controls channel conductivity using an electric field.

  True
• MOSFETs use an insulating layer for gate isolation.


  True
• FETs use an electric field to control channel conductivity.


  True
• Positive gate voltage enhances the channel in a MOSFET.


  True
• What is the main difference between FETs and BJTs in terms of control type?

  Voltage vs Current
• The gate structure of a JFET is a p-n junction
• MOSFETs are commonly used in both digital and analog circuits.


  True
• What widens the depletion region in a JFET when reverse bias is increased?

  Gate-source junction
• The gate-source voltage in a JFET is a reverse bias voltage.


  True
• MOSFETs have higher gain and faster switching speeds compared to JFETs.


  True
• Rank the applications of MOSFETs in order of preference:

  1️⃣ Digital Logic Gates

  2️⃣ Power Electronics

  3️⃣ Amplifiers
• In FETs, the terminal where carriers enter the channel is called the source
• MOSFETs use an insulating layer for gate isolation.


  True
• FETs generally have lower power consumption compared to BJTs
• What type of gate isolation is used in a JFET?

  Depletion region
• The source terminal of an FET is where carriers enter the channel
• The gate structure of a JFET is a p-n junction