A few stray discussions of pn- junctions and how they interact with temperature.
-
pn-Junction Temperature Coefficient
A pn-junction is the fundamental semiconducting element, known as a diode when considered a component, but these junctions exist where a “diode” isn’t really intended … such as at semiconductor material interfaces. An Nwell in a p-substrate forms a pn-junction and effort is taken to assure such a “diode” is not forward biased. The p-substrate…
-
PTAT
Proportional-To-Absolute-Temperature “Absolute temperature” being degrees Kelvin. Conveniently, degrees Celsius/Centigrade overlaps the Kelvin scale with identical magnitude: 1K = 1oC I have elsewhere presented the diode equation as: and demonstrated that the “minus 1” term may usually be neglected. Doing so, I can write the diode equation as: The parameter “n” is…