13.2.2 Exploring field-effect transistors (FETs)

• The electric field created by the gate in an FET modulates the conductivity of the semiconductor material.

  True
• P-channel FETs use holes as majority charge carriers and require a negative voltage to increase conductivity.
• In the saturation mode of an FET, the drain current remains constant despite increasing the drain-to-source voltage
• In the saturation mode of a FET, the drain current remains constant despite increasing VDS.


  True
• In the saturation mode, increasing VDS does not change the drain current.

  True
• What type of gate voltage polarity is required for P-channel FETs?

  Negative
• In saturation mode, the drain current is constant regardless of VDS.


  True
• Match the feature with the transistor type:

  Majority charge carriers ↔️ FET

  Minority charge carriers ↔️ BJT
• FETs can be used as current sources when operating in the saturation region.
• The source of an FET is the terminal from which charge carriers flow, while the drain is the terminal to which charge carriers flow
• What type of charge carriers do N-channel FETs use?

  Electrons
• What are the three main components of an FET?

  Source, drain, and gate
• In the cutoff mode of a FET, the channel is non-conducting
• In the cutoff mode, the drain current is near zero
• Match the FET type with its feature:

  N-channel FET ↔️ Positive gate voltage

  P-channel FET ↔️ Negative gate voltage
• Order the three main operation modes of a FET based on the I-V characteristics:

  1️⃣ Cut-off

  2️⃣ Linear

  3️⃣ Saturation
• The input impedance of FETs is in the range of MΩ
• What advantage do FETs have in amplifier applications due to their high input impedance?

  Minimal signal loading
• What is a field-effect transistor (FET)?

  A type of transistor
• Match the FET operation mode with its characteristic:

  Cutoff ↔️ Non-conducting channel

  Linear ↔️ Drain current proportional to VDS

  Saturation ↔️ Constant drain current
• N-channel FETs are often used in power management applications.

  False
• What is the working principle of field-effect transistors (FETs)?

  Modulating conductivity with electric field
• What does VGS represent in FETs?

  Gate-to-source voltage
• What are the majority charge carriers in N-channel FETs?

  Electrons
• P-channel FETs are commonly used in power management applications due to their lower on-resistance
• What is the control mechanism in FETs?

  Electric field
• FETs are more suitable for high-frequency and low-power applications compared to BJTs.


  True
• FETs have lower power consumption and faster switching speeds compared to BJTs.


  True