Problem with transistors

Discussion in 'Homework Help' started by MrRockchip, Nov 4, 2010.

  1. MrRockchip

    MrRockchip Thread Starter New Member

    Joined:
    May 25, 2010
    Messages:
    18
    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)

    [​IMG]
  2. Kermit2

    Kermit2 Senior Member

    Joined:
    Feb 5, 2010
    Messages:
    2,695
    Location:
    Houston, TX
    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.
  3. MrRockchip

    MrRockchip Thread Starter New Member

    Joined:
    May 25, 2010
    Messages:
    18
    If don't count the thermal current, then you have all the necessary data.
  4. Kermit2

    Kermit2 Senior Member

    Joined:
    Feb 5, 2010
    Messages:
    2,695
    Location:
    Houston, TX
    well like I said, I'm out of school a long time, so carry on smartly then soldier
  5. hobbyist

    hobbyist Well-Known Member

    Joined:
    Aug 10, 2008
    Messages:
    722
    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: Nov 4, 2010
Similar Threads
Forum Title Date
Homework Help problem of fourier series Today at 2:29 AM
Homework Help Delta Source with Wye Load problem Feb 21, 2015
Homework Help Finite state machine problem Feb 16, 2015
Homework Help Ladder Diagram Problem Feb 8, 2015
Homework Help Voltage Controlled Current Source PSPice Homework Problem Feb 7, 2015

Share This Page