To operate properly a transistor base emitter junction must be forward biase with
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to operate transistor properly,the two p-n junctions must be correctly biased with external DC voltage.
for NPN Transistor,
Base - Positive, Emitter- Negative, Collector- Negative
To operate Transistor properly i.e., in active mode
BE junction - forward biased
CB junction - reverse biased
Bipolar transistors are so named because the controlled current must go through two types of semiconductor material: P and N. The current consists of both electron and hole flow, in different parts of the transistor.Bipolar transistors consist of either a P-N-P or an N-P-N semiconductor “sandwich” structure.The three leads of a bipolar transistor are called the Emitter, Base, and Collector.Transistors function as current regulators by allowing a small current to control a larger current. The amount of current allowed between collector and emitter is primarily determined by the amount of current moving between base and emitter.In order for a transistor to properly function as a current regulator, the controlling (base) current and the controlled (collector) currents must be going in the proper directions: meshing additively at the emitter and going against the emitter arrow symbol.
for NPN Transistor,
Base - Positive, Emitter- Negative, Collector- Negative
To operate Transistor properly i.e., in active mode
BE junction - forward biased
CB junction - reverse biased
Bipolar transistors are so named because the controlled current must go through two types of semiconductor material: P and N. The current consists of both electron and hole flow, in different parts of the transistor.Bipolar transistors consist of either a P-N-P or an N-P-N semiconductor “sandwich” structure.The three leads of a bipolar transistor are called the Emitter, Base, and Collector.Transistors function as current regulators by allowing a small current to control a larger current. The amount of current allowed between collector and emitter is primarily determined by the amount of current moving between base and emitter.In order for a transistor to properly function as a current regulator, the controlling (base) current and the controlled (collector) currents must be going in the proper directions: meshing additively at the emitter and going against the emitter arrow symbol.
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