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ELECTRONIC DEVICES
CHAPTER 3
Lecturer: Dr. Đào Việt Hùng
Department of Electronics Technology and Biomedical Engineering
School of Electronics and Telecommunications
Hanoi University of Science and Technology
Email: hunget.bk@gmail.com
Bipolar Junction Transistor
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History
In 1906, the first triode was
invented. This could be used to
amplify signal
vacuum tube generation
In 1974, the first semiconductor
transistor was invented by J.
Bardeen, W. Brattain, and W.
Shockley at the Bell Telephone
Laboratories
Transistor could also be used to
amplify signal; but “solid”, not
vacuum
solid-state generation
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What is Bipolar Junction Transistor?
Bipolar Junction Transistor (BJT) or Bipolar
Transistor = Transistor tiếp xúc lưỡng cực.
Bipolar transistors use both e and h charge
carriers; different from Unipolar transistors use
only one kind of charge carriers (e.g., FET).
BJT is also simply called as transistor.
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Contents
1. Structure and basic operation
2. Transistor bias circuits
3. Transistor models
4. Transistor parameters and datasheets
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1 - Structure and basic operation
BJT structure
Basic operation
Collector characteristic curves
Switching mode and amplification mode
