Analog Electronics - GATE practice papers - Electronics & Communication for Q. 509

Q.  Which reasons prohibit /reduce the probability of recombining of charge carriers in the base region of bi-polar junction transistor amplifier? (Marks : 02)
- Published on 19 Oct 15

a. Increase in collector voltage increases the space charge width & decreases base width
b. Increase in emitter voltage increases the space charge width & decreases base width
c. Increase in emitter voltage decrease the space charge width & increases base width
d. Increase in collector voltage decreases the space charge width & increases base width

ANSWER: Increase in collector voltage increases the space charge width & decreases base width
 
Due to the phenomenon of early effect, the collector current increases slightly with voltage. This results in the reduction of base current.
However, increase in collector voltage also increases the space charge but reduces effective base-width. Therefore, there is less possibility for recombination within the base region.

Related Content

➨ Post your comment / Share knowledge


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)
▲