[sdiy] [OT] PTAT with PN junction

[Tim Ressel]

Hello to all semiconductor experts,

There seems to be a hole in my knowledge. I an using a
transistor PN junction as a temperature sensor (PTAT)
a la AN299. I am trying to determine die temperature
based on the Vbe so I can set the thermostat. How do
you determine the temperature based on Vbe?  I know
the Vbe at room temperature (25C) is 0.570V. The PN
junction is biased from a 10V sourse thru a 15K
resistor.

Thanks!

--TR


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