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npnvspnp [2013/08/13 12:13] (current)
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 +==== NPN ====
 +
 +
 +NPN. If the base is at a higher voltage than the emitter, current flows from collector to emitter.
 +
 +NPN. Small amount of current also flows from base to emitter.
 +
 +NPN. Voltage at base controls amount of current flow through transistor (collector to emitter).
 +
 +[[image:​NPN.gif|300px]]
 +
 +
 +==== PNP ====
 +PNP. If the base is at a voltage than the emitter, current flows from emitter to collector.
 +
 +PNP. Small amount of current also flows from emitter to base.
 +
 +PNP. Voltage at base controls amount of current flow through transistor (emitter to collector).
 +
 +[[image:​PNP.gif|300px]]
 +
 +Follow the arrow to see the direction of current flow.
 +
 +
 +==== MNEMONIC AID ====
 +To figure out which is which when you're reading a schematic, remember this:
 +
 +**N**ot **P**ointed i**N** (NPN) Arrow points away from junction.
 +
 +**P**ointed i**N**. (PNP) Arrow points toward junction.
  
npnvspnp.txt ยท Last modified: 2013/08/13 12:13 (external edit)