Podcast
Questions and Answers
What distinguishes a field-effect transistor (FET) from a bipolar junction transistor (BJT)?
What distinguishes a field-effect transistor (FET) from a bipolar junction transistor (BJT)?
- FET has low input impedance, while BJT has high input impedance.
- FET is a voltage-controlled device, while BJT is a current-controlled device. (correct)
- FET uses two charge carriers, while BJT depends on either electrons or holes.
- FET is a bipolar device, while BJT is a unipolar device.
Which type of charge carriers does the field-effect transistor (FET) depend on for conduction?
Which type of charge carriers does the field-effect transistor (FET) depend on for conduction?
- Protons
- Holes only
- Electrons only
- Both electrons and holes (correct)
What is the most significant characteristic of a field-effect transistor (FET)?
What is the most significant characteristic of a field-effect transistor (FET)?
- Bipolar device
- Current-controlled device
- High input impedance (correct)
- Low input impedance
Which of the following is NOT a type of field-effect transistor (FET)?
Which of the following is NOT a type of field-effect transistor (FET)?
What does the prefix 'bi-' in 'bipolar device' indicate about the conduction level of the transistor?
What does the prefix 'bi-' in 'bipolar device' indicate about the conduction level of the transistor?
What is the main difference between a BJT transistor and an FET transistor?
What is the main difference between a BJT transistor and an FET transistor?
What does the prefix 'bi-' in 'bipolar device' reveal about the BJT transistor?
What does the prefix 'bi-' in 'bipolar device' reveal about the BJT transistor?
Which type of field-effect transistor (FET) relies on either electron or hole conduction?
Which type of field-effect transistor (FET) relies on either electron or hole conduction?
What is the fundamental difference between n-channel and p-channel field-effect transistors (FETs)?
What is the fundamental difference between n-channel and p-channel field-effect transistors (FETs)?
Which type of device is a BJT transistor, and why?
Which type of device is a BJT transistor, and why?
Flashcards
FET vs. BJT
FET vs. BJT
A field-effect transistor (FET) is a voltage-controlled device where the current flow is regulated by an electric field, while a bipolar junction transistor (BJT) is a current-controlled device where current flow is influenced by the injection of charge carriers.
FET Charge Carriers
FET Charge Carriers
Field-effect transistors can utilize both electrons and holes as carriers for conduction.
FET Key Characteristic
FET Key Characteristic
A key feature of a field-effect transistor is its high input impedance, meaning it draws very little current from the controlling signal.
FET Types
FET Types
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Bipolar Prefix
Bipolar Prefix
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BJT vs. FET
BJT vs. FET
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Bipolar BJT
Bipolar BJT
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p-channel FET
p-channel FET
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n-channel vs. p-channel FET
n-channel vs. p-channel FET
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BJT: Current-Controlled
BJT: Current-Controlled
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Study Notes
Field-Effect Transistors (FET)
- A three-terminal device used for various applications.
- A voltage-controlled device, unlike BJT transistors which are current-controlled.
- Has two categories: n-channel and p-channel FETs, similar to npn and pnp bipolar transistors.
Characteristics
- High input impedance is a significant characteristic of FETs.
Types of FETs
- Junction Field-Effect Transistor (JFET)
- Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET)
Key Differences with BJTs
- FETs are unipolar devices, relying on either electron (n-channel) or hole (p-channel) conduction.
- BJTs are bipolar devices, depending on two charge carriers: electrons and holes.
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Description
Explore the fundamentals of Field-Effect Transistors (FET) in this quiz. Learn about the differences between FET and BJT transistors, the functionality of n-channel and p-channel FETs, and how FETs are voltage-controlled devices.
