Max Collector Current in Transistor Circuits

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Homework Help Overview

The discussion revolves around calculating the maximum collector current in transistor circuits, specifically focusing on the relationships between collector current, base current, and voltage conditions in the circuit.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore the need for source voltage to determine base current and subsequently collector current. Questions arise regarding the maximum possible collector current and the conditions under which it can be calculated, including considerations of saturation mode and voltage drop across the collector-emitter junction.

Discussion Status

Some participants have identified potential errors in their calculations and are re-evaluating their assumptions about voltage values and operational modes of the transistor. There is an ongoing exploration of how to correctly interpret the maximum collector current based on circuit conditions.

Contextual Notes

Participants note discrepancies in voltage values and calculations, particularly regarding the maximum collector current and the implications of saturation mode on these calculations. There is mention of homework constraints that may influence the approach to the problem.

Marcin H
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Homework Statement


Calculate the max collector current.

Homework Equations


Ic=BIb
V=IR

The Attempt at a Solution


I'm not sure how to find the max collector current. Don't I need the source voltage to find my Ib and then use that to find my Ic? Is there another way of finding Ic_max? Also, are B,C,D done correctly? I feel like D is wrong because of the huge voltage. (sorry about the bad scan. Had to use phone)
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a. it says max POSSIBLE collector current. how high can Vce go?
b. & c. OK
d. can Ic exceed 10V/1K?
 
rude man said:
a. it says max POSSIBLE collector current. how high can Vce go?
b. & c. OK
d. can Ic exceed 10V/1K?
Just noticed the 2A error in my calculation for D. Should be 8V for Vce. And for A I'm not sure. I think the max possible collector current would happen in saturation mode. So does that mean Vce=Vce(sat)? So Vce would be 0.2V?
 
Marcin H said:
Just noticed the 2A error in my calculation for D. Should be 8V for Vce. And for A I'm not sure. I think the max possible collector current would happen in saturation mode. So does that mean Vce=Vce(sat)? So Vce would be 0.2V?
Icmax=(10V-0.2V)/1000ohms = 9.8mA. Never mind. Got it :)
 

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