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You are here: Home / Replies / transistor has only two

transistor has only two

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transistor has only two

January 21, 2012 at 7:20 pm #7066
Qaisar
Participant

transistor has only two PN-junction .

base-Emitter junction and Base- collector jumction .

there is no PN junction between emitter and collector.

transistor can be represented by diode equivalent cct.

 

to use transistor as a amplifier its base emitter junction is forward biased and base collector junction is reversed biased. now how the base collector is reverse biased .

A PN junction is said to be forward biased when anode is at 0.7v higher then cathode.

now look at ur diagram .

collector bias voltages(VCC)  are at higher potential then base voltage so cathode of base-collector junction is at higher potenial then anode so this junction is reverse biased. 

hope u got it…

 

wysiwyg_imageupload:3615:

  

 

 

 

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