Darlington Pair/ Darlington Transistor

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SUMMARY

Darlington transistors are designed to amplify weak signals by connecting two NPN bipolar junction transistors (BJTs) in a specific configuration. This configuration involves connecting the emitter of the first BJT to the base of the second BJT, while also connecting their collectors together. Additionally, PNP Darlington pairs are also possible. The Sziklai pair may offer certain advantages over the traditional Darlington pair in specific applications.

PREREQUISITES
  • Understanding of bipolar junction transistors (BJTs)
  • Basic knowledge of transistor configurations
  • Familiarity with circuit diagrams
  • Concept of signal amplification
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  • Research the advantages and disadvantages of Sziklai pairs compared to Darlington pairs
  • Explore applications of Darlington transistors in electronic circuits
  • Learn about PNP Darlington pairs and their configurations
  • Study signal amplification techniques using BJTs
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Electronics enthusiasts, circuit designers, and anyone interested in understanding transistor configurations and signal amplification techniques.

Larrytsai
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Hey guys,

I just found out about these darlington transistors, and I read that the purpose of these transistors are to "amplify WEAK signals".

After taking a look at the circuit diagram for the darlington pairs, it seems to me that it is just 2 npn bjts with one of the bjt's emitter connected to the base of the other. Well I was wondering is this how you make a darlington pair?, you just get 2 bjts and connect one emitter to the base of the other?
 
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Larrytsai said:
After taking a look at the circuit diagram for the darlington pairs, it seems to me that it is just 2 npn bjts with one of the bjt's emitter connected to the base of the other. Well I was wondering is this how you make a darlington pair?, you just get 2 bjts and connect one emitter to the base of the other?
No, the transistors should have their collectors connected together as well. It is also possible to have a PNP Darlington pair.

It's worth noting that the http://en.wikipedia.org/wiki/Sziklai_pair" may have advantages over the Darlington Pair.
 
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