Join Barron Stone for an in-depth discussion in this video PNP bipolar junction transistors, part of Electronics Foundations: Semiconductor Devices.
- [Instructor] A PNP Bioplar Junction Transistor…is the counterpart to an NPN Transistor,…working in basically the same, but opposite fashion.…So, the easiest way to understand how a PNP works…is to compare it to the NPN.…Structurally, where the NPN Transistor consists…of a section of P-Type material sandwiched…between two N-Type sections, the PNP Transistor,…has two P-Type sections, with a region of N-Type material…in the middle.…
In terms of usage, both transistors use the same amount…of current at their Base terminals…to regulate the current flowing…between the other two terminals.…However, the direction of those currents is different…between the two types of transistors.…The control current for an NPN flows into the Base terminal…and the larger regulated current flows from…the Collector to the Emitter.…In a PNP, on the other hand, current flows out…of the Base terminal and the regulated current…though the transistor flows in the opposite direction…from the Emitter to the Collector.…
One key difference between the two types of transistors,…
- Semiconductor materials
- Diode applications
- Rectifying a signal
- Detecting the signal peak
- Protecting against large signals, reverse current, and flyback voltage
- Special purpose zener diodes, Schottky diodes, and photodiodes
- NPN and PNP bipolar junction transistors
- Using a BJT as a switch
- Field effect transistors
- Differences between BJTs and MOSFETs
- Operational amplifiers
- Op-amp applications
- Comparing signals
- Buffering signals
- Amplifying signals
- Filtering signals
- Combining signals
Skill Level Intermediate
Learning to use MakerBot 3D Printerswith Kacie Hultgren1h 5m Appropriate for all
2. Diode Applications
3. Special Purpose Diodes
4. Bipolar Junction Transistors
5. Transistor Applications
6. Field Effect Transistors
7. Operational Amplifiers
Feedback circuits6m 30s
8. Op-Amp Applications
Next steps1m 9s
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