A Darlington transistor is an electronic component that includes the combination of two PNP or NPN bipolar junction transistors which are connected back to back. The first transistor’s emitter terminal is connected to the second transistor’s base terminal. Therefore, the base supply is only provided to the primary transistor whereas the output current is received simply from the second transistor. So two transistors allow an extremely high amount of current gain. This can be achieved through … [Read more...]