The purpose of a transistor is to control the flow of current from one point to another. To accomplish this, we must construct a two-junction device known as a bipolar transistor. Both P (positive) ...

There are numerous differences between NPN and PNP transistors, and even though both are bipolar junction transistors, the direction of current flow is the name of the game.

There are two basic types of transistors: Bipolar Junction Transistors (BJTs) and Field Effect Transistors (FETs). BJTs are controlled by current, while FETs are controlled by voltage. Within these ...

There are equivalent P-channel devices, just as there are PNP and NPN bipolar transistors. Were you to bias an n-channel JFET as you would a bipolar transistor with a positive bias on its gate, ...

In the simple circuit shown in Figure 9.9 (the case shown is for an NPN transistor, but a virtually identical circuit, but with negative supply rails, could be made with a similar PNP transistor), the ...

(Image courtesy of Texas Instruments, Inc.) NPN Bipolar Transistor BJTs are either a sandwich of p-type silicon surrounded by n-type regions or n-type surrounded by p-type.

In the early days, PNP bipolar transistors were common, but the bulk of circuits you see today use NPN transistors. As [Aaron Danner] points out, many people think PNP transistors are “backwa… ...

Point-contact transistors were soon replaced by “bipolar junction” transistors (BJTs) and “field effect” transistors ... thus has either a “PNP” or “NPN” configuration.

Nexperia has announced 20 bipolar power transistors in 2 x 2mm DFN2020D-3 packaging, half of them automotive-qualified. The span 50 and 80V ratings, 1 to 3A currents and both npn and pnp polarities.