P-N junction

Discussion in 'Homework Help' started by Hello, Dec 20, 2008.

  1. Hello

    Thread Starter Active Member

    Dec 18, 2008
    A certain P-N junction diode of germanium has a leakage current of 10^-8 A at 127 Deg C. The diode is forward-biased with a constant-current source of 1 mA at room temperature. If current is assumed to remain constant calculate the junction barrier voltage at 127 Deg C.

    - There is the room temperature and 127 Deg C. Not sure if u have to use the room temperature as well somehow?!

    P.S. This was posted in a previous thread but wasn't resolved, hope someone else can have a go.
  2. mik3

    Senior Member

    Feb 4, 2008
    Use the diode equation and rearrange it to find V. Use 127 degrees Celcious to define KT (note that you have to convert celcious to kelvin).