Chapter 4: Difference between revisions
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*PNP: Pointing iN Please |
*PNP: Pointing iN Please |
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*The arrow is for the emitter current. For an NPN the current flows into the collector. For a PNP the current flows out of the collector. |
*The arrow is for the emitter current. For an NPN the current flows into the collector. For a PNP the current flows out of the collector. |
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===How a BJT works=== |
===How a BJT works=== |
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*What are the Saturation, Reverse Active and Cutoff regions used for? |
*What are the Saturation, Reverse Active and Cutoff regions used for? |
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*Why do we always seem to use a common emitter configuration? |
*Why do we always seem to use a common emitter configuration? |
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Revision as of 10:06, 3 March 2010
Bipolar Junction Transistor
- NPN: Not Pointing iN
- PNP: Pointing iN Please
- The arrow is for the emitter current. For an NPN the current flows into the collector. For a PNP the current flows out of the collector.
How a BJT works
Large-Signal DC models
| Base-Emitter | Collector-Emitter | Region |
|---|---|---|
| FB | FB | Saturation |
| FB | RB | Active |
| RB | FB | Reverse Active |
| RB | RB | Cutoff |
 |
 |
- What are the Saturation, Reverse Active and Cutoff regions used for?
- Why do we always seem to use a common emitter configuration?
- What does the Reverse Active large-signal model look like? How about graphically?
- What is the Triode region?