Are transistors voltage driven or current or power driven devices?
I guess you could say a transistor is current driven, and for sure you can say it is current controlled, but about 0.7V forward emitter to base Voltage is required to turn a transistor on. The circuit is normally designed so that this 0.7V is furnished by the DC power supply but the transistor can be turned on by the forward biasing portion of the ac input signal (driver). Once a transistor is turned on then the additional amount of base current supplied by the driver is what controls the magnitude of the transistor`s output current. Thus a transistor is a current driven device once it is turned on by a forward emitter base Voltage.
Transistors are current driven devices.they can block or enhance or partially allow the current to pass through, depending on their bias and their construction. Some of them can act as power controllers whereas others can act as switches and some can amplify the signals.Basically they are junctions of semiconductors( NPN or PNP and so on…..) Hope you get it!
There is a fixed relationship between the base-emitter voltage of a bipolar junction transistor (BJT) and the base-emitter current. You can call it “voltage driven” if you want, or you can call it “current driven.” The transistor doesn’t care. You must remember though, that if you think of a BJT as “voltage driven,” there will also be significant current, and if you think of the transistor as “current driven,” there must also be a “bias” voltage.
