Wdwd (CC BY 3.0). The high input impedance has another effect less coupled to small signal work. Where a bipolar transistor requires significant base current to turn itself on, the corresponding ...

That’s where FET drivers come in – it’s a small chip ... it has an NPN transistor, but its base driven through a capacitor, so that only the AC component of the driving signal gets through.

Transistors are used in a wide variety of applications. They can act as amplifiers, taking a small input signal and making it larger. They can also be used as switches, turning an electrical signal on ...