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Darlington Pair
f-alpha.net » Electronics » Basic Circuits » Darlington Pair » Let's go... » Experiment 9 - Sziklai Pair

Experiment 9 - The Sziklai Pair

Build the circuit shown. By turning the Potentiometer P1 you realize that the circuit behaves like a ordinary NPN Darlington Pair.

Circuit of Sziklai pair. (Enlarge)

Also the gain of the Sziklai pair βS is approximately

βS =  βT1 ×  βT2.

(See Experiment 17 to derive this formula.)

However, the Sziklai pair has another advantage that makes it interesting for applications...

Circuit diagram of a Sziklai pair.

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