A Sziklai pair is similar to the darlington_pair and used to offer a very high current gain even with low base current. Unlinke the Darlington it has one NPN and one PNP transistor, one advantage over the Darlington pair is that the base turn-on voltage is only about 0.6V or half of the Darlington’s 1.2V nominal turn-on voltage.
\[I_C= I_B * (\beta_1 * \beta_2)\]svg schematics by matt-chv is licensed under CC BY-SA 4.0