10 Questions
What type of charge carriers does a bipolar junction transistor (BJT) use?
Electrons and electron holes
How many kinds of charge carriers does a unipolar transistor, like a field-effect transistor (FET), use?
One
What allows a small current injected at one of the terminals of a bipolar transistor to control a much larger current flowing between the terminals?
Bipolar transistor
What are the regions in a single crystal of material where p–n junctions are formed in a bipolar transistor?
n-type and p-type
What displaced the original point-contact transistor due to its superior predictability and performance?
Junction transistors
What is the main difference between a bipolar junction transistor (BJT) and a unipolar transistor like a field-effect transistor (FET)?
BJT uses both electrons and electron holes as charge carriers, while FET uses only one kind of charge carrier
How are the p–n junctions formed in a bipolar junction transistor (BJT)?
By changing the doping of the semiconductor material as it is grown
What allows a small current injected at one of the terminals of a bipolar transistor to control a much larger current flowing between the terminals?
The transistor's capability of amplification or switching
What displaced the original point-contact transistor due to its superior predictability and performance?
Junction transistors
What are the regions in a single crystal of material where p–n junctions are formed in a bipolar transistor?
Two semiconductor types, n-type and p-type
Study Notes
Bipolar Junction Transistors (BJTs) vs Unipolar Transistors
- BJT uses two types of charge carriers: holes and electrons.
- Unipolar transistors, like FETs, use only one type of charge carrier.
Operation of BJTs
- A small current injected at one of the terminals of a bipolar transistor controls a much larger current flowing between the terminals due to the current amplification property of the transistor.
Structure of BJTs
- P-n junctions are formed in a bipolar transistor in three regions of a single crystal of material: base, collector, and emitter.
History of Transistors
- The bipolar junction transistor (BJT) displaced the original point-contact transistor due to its superior predictability and performance.
Formation of P-N Junctions
- P-n junctions in a bipolar junction transistor (BJT) are formed by combining p-type and n-type semiconductor materials.
Key Characteristics of BJTs
- The current amplification property of a bipolar transistor allows a small current injected at one of the terminals to control a much larger current flowing between the terminals.
Test your knowledge of bipolar junction transistors (BJTs) and field-effect transistors (FETs) with this quiz. Explore the differences between these two types of transistors, their charge carriers, and their operating principles.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
