semiconductor temperature measurement

Discussion in 'The Projects Forum' started by gary1wang, Mar 7, 2012.

  1. gary1wang

    Thread Starter Member

    Sep 18, 2008
    23
    0
    Hi Guys.



    I am using diode connected bipor junciton transistor to measure temperature. The voltage is measured by the microcontroller.

    The temperature is calculated base on T=qΔVbe/(nKln(I1/I2))

    n is emission coefficient or ideality factor



    There is some temperature difference between actual temperature and measured temperature. The difference is getting bigger at 2 degrees. and no difference lower than 2 degrees

    My question is that there is a emisson coefficient on bipor junction transistor. Is this emission coefficent increases with temperterature?

    Is there any material that i can read on the temperature effect on transistor on semiconductor physics?
     
  2. Blofeld

    Active Member

    Feb 21, 2010
    82
    18
  3. gary1wang

    Thread Starter Member

    Sep 18, 2008
    23
    0
    Hi, I Want to know how is going on in side bipolar junction transistor related to base emitter depletion region, base width and base collector reverse depletion region


    Best Regards

    gary
     
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