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Describe the structures of the two types of bipolar junction transistor

Describe the working principle of a BJT

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2) Highlight the importance of PNP application

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2) Highlight the importance of PNP application

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Class B Amplifier
[make use of transistor matching (connect both NPN and PNP BJTs in a single circuit) to continuously generate high power]

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NPN BJTs work in a similar way as NPN BJTs (except that the polarities of the voltages and directions of the currents are reversed)

NPN BJTs enable faster switching because n-type semiconductor can transfer electrons significantly faster than p-type semiconductor can transfer positive electron holes (electrons have greater mobility than electron holes)

NPN BJTs are more commonly used in the industry (in Asia)

Whether to use NPN or PNP depends on the circuit it is connected to (will the BJT need to sink or source current)

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All examples are illustrated using NPN BJT

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All examples are illustrated using NPN BJT

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1) Explore using Multisim to simulate circuits to compare NPN and PNP

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1) Explore using Multisim to simulate circuits to compare NPN and PNP

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Don't really need to know PNP

PNP is basically the same as NPN