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  #1  
Old 11-04-2010, 01:33 PM
MrRockchip MrRockchip is offline
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Default Problem with transistors

I have 5 problems, which are similar to each other.
But I need an example. Please, help me to solve this one:
(and I will solve the remaining 4 by myself)

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  #2  
Old 11-04-2010, 01:52 PM
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Kermit2 Kermit2 is offline
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I'm a long time out of school, but I think at least one more piece of info will be needed to answer that. Yes it will either conduct or not conduct at the extremes, but I believe the transistors gain must be known to get an expression for the output.
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Old 11-04-2010, 02:32 PM
MrRockchip MrRockchip is offline
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If don't count the thermal current, then you have all the necessary data.
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Old 11-04-2010, 03:04 PM
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well like I said, I'm out of school a long time, so carry on smartly then soldier
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Old 11-05-2010, 02:22 AM
hobbyist hobbyist is offline
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Take a look at your circuit, the bottom transistor has it's base emitter junction conducting because it is forward biased, however the collector is not biased at all, due to the top transistor being reversed biased, and not conducting.

So your voltage is the voltage of a open collector transistor with full base voltage applied.

This is just a somewhat educated guess.

Last edited by hobbyist; 11-05-2010 at 02:38 AM.
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