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Bipolar Transistors (BJTs)

There are two types of bipolar transistors: NPN type and PNP type. NPN-type products have low withstand voltage to high withstand voltage. PNP-type products with withstand voltage of 400 V or less, and particularly those with withstand voltage of 200 V or less, are mainstream.
There is an amplification function to convert small signals to large signals. The ratio of collector current IC and base current IB (IC/IB) is called DC current gain, denoted as hFE.
When small current (IB) flows from base to emitter, current of IB x hFE flows from collector to emitter.

Symbol and structure of NPN transistor
Fig. 3-1(a) Symbol and structure of NPN transistor
Symbol and structure of PNP transistor
Fig. 3-1(b) Symbol and structure of PNP transistor

BJTs are current-driven devices driven by base current.

Operation of NPN transistor
 Base current: Current from base to emitter
 Collector current: Current from collector to emitter

Operation of PNP transistor
 Base current: Current from emitter to base
 Collector current: Current from emitter to collector

Chapter III : Transistors

Types of Transistors
Bias Resistor Built-in Transistors (BRTs)
Junction Field-Effect Transistors (JFETs)
Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs)
Differences between BJT and MOSFET
Structure and Operation of MOSFET
MOSFET Performance Improvement: Decision Factors of RDS(ON)
MOSFET Performance Improvement: Approach to Low RDS(ON)
MOSFET Performance Improvement: Super-Junction MOSFETs (SJ-MOS)
Summary of MOSFET Features by Structure
Performance of MOSFETs: Drain Current and Power Dissipation
Performance of MOSFETs: Avalanche Capability
Performance of MOSFETs: Characteristic of Capacitance
Performance of MOSFETs: Safe Operating Area(or Area of Safe Operation)
Insulated-Gate Bipolar Transistors (IGBTs)
Operation of Insulated-Gate Bipolar Transistors (IGBTs)
Performance Improvement of IGBTs: Evolution of Vertical Design
What are RC-IGBTs and IEGTs?
Application of IGBTs
Comparison of Forward Characteristics of IGBTs and MOSFETs
Comparison of Transistors by Structure
Datasheets of MOSFET: Maximum Ratings
Datasheets of MOSFET: Electrical Characteristics
Datasheets of MOSFET: Capacitance and Switching Characteristics
Datasheets of MOSFET: Body Diode

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