Why FET called current controlled device?

Answer 1

BJT is a current controlled device because its output current is dependent upon the current in the base while for FET it is controlled by the voltage at the gate terminal of the transistor.

BJT is a current controlled device because its base current is not zero while for a FET the gate current is zero

Answer 2

Because the operation of the transistor is determined by the current at the base. the principle equations of BJT operation are:

Ic = h*Ib ,and

Ie=Ib+Ic

thus device operation is controlled by the input current.

Answer 3

a bjt is a current controlled device as the base current controls the output current,i.e the collector current

Answer 4

FET is not current controlled device. FETs are voltage controlled device as depletion region around the junction is function of reverse voltage applied to the GATE of JFET

Answer 5

Because the bipolar junction transistor changes the signal in response to an outside input.

Answer 6

when BJT is in steady state (wher we controle the current di/dt) control the currnt and voltage are applied at input (base) o juntion was establish

Answer 7

When bipolar junction transistor(BJT) is operated under proper biasing large current flows through the BJT,thus it is called current operated device.