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ID number:473112
 
Author:
Evaluation:
Published: 16.09.2025.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Time period viewed: 2021 - 2025 years
Extract

 bipolāros tranzistorus (no ang. val. bipolar junction transistor – BJT) iedala divās grupās: NPN un PNP tipa;


Att. 1. PNP un NPN tranzistoru struktūra un simboli (pa kreisi) un darba režīmi (pa labi)

 BJT darba režīmi:
Darba režīms Nosacījumi Īpašības
Pārvades VBE > 0, VBC < 0 Liels pastiprinājums un laba atsaiste starp ieeju un izeju
Piesātinājuma VBE > 0, VBC > 0 Nav atsaistes un tranzisotrs ir piesātināts ar mazākuma lādiņnesējiem ⇒ lai izietu no piesātinājuma režīma nepieciešams laiks
Atgriezeniskais VBE < 0, VBC > 0 Zems pastiprinājums
Nogriezuma VBE < 0, VBC < 0 Tranzistorā plūst niecīgas sproststrāvas: darbojas gandrīz kā atvērta ķēde

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