Transistor

 
5.3  Transistor
 
  Transistor  
 

A three-terminal semiconductor device used to regulate current or to amplify an input signal into a greater output signal.

Transistors are also used to switch electronic signals.

 
     
 

Two types of transistors:

  1. PNP-type transistor
    • The arrow on the emitter (E) is drawn inward the base (B).
  2. NPN-type transistor
    • The arrow on the emitter (E) is drawn out of the base (B).
 
 
  Formula  
  \(I_E + I_B + I_C\)