Darlington Pair

  • Thread starter Lunat1c
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  • #1
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I have a small problem regarding darlington transistor pairs.

Lets say a source is connected to the coupling capacitor Ci and this source has an internal resistance of for example 10kOhms. When finding the Output resistance of the darlington, should the internal resistance of the source be taken in consideration?

Thank you

Note: The coupling capacitors are assumed equivalent to a short at signal frequency
 

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  • #2
CEL
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Yes, the internal resistance of the source is in parallel with R1 and R2.
 

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