Definition of Bipolar Junction Transistor (BJT)

The Bipolar Junction Transistor (BJT) is an active device. In simple terms, it is a current controlled valve. The base current (IB) controls the collector current (Ic).

Tuesday, March 17, 2009

Common Circuit Application(Voltage Controlled Switch)


For the on state the gate voltage VGS = 0 and for the off state |VGS| > |VGS.off| (of greater magnitude then VGS.off and with the same sign). The sign of the voltage depends on the type of FET, negative for n-channel and positive for p-channel.

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