What are the most accurate values for the saturation current in various diodes (Silicon, Germanium, etc...)? I realize that the values are not exact for all diodes of a particular type, but what are the best, most accurate approximations? And what degree of error is usually allowable for these values?
2007-08-22 06:27:55 · 2 answers · asked by Not Eddie Money 3 in Science & Mathematics ➔ Other - Science
Diode saturation VOLTAGE is around .2V for germanium and .65V for silicon. That's determined by physics. The saturation CURRENT is just a calibration parameter for a specific diode, used in the Shockley diode model. If you buy a batch of 100 diodes of the same type from the same manufacturer, there will be very little variation in saturation current in the batch.
2007-08-22 08:06:32 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋
The saturation current is the reverse saturation current. Diodes follow the equation Id = Io*exp{qV/(kT)-1}. The value of Vd is about 0.6V at 1 mA and that would mean Io, the saturation current of 10^ -14 amp. This current is related to the area and larger the area, higher is Io. That would mean that high current diodes will require lesser voltage for 1mA.. perhaps 0.5V
2016-05-19 23:33:51 · answer #2 · answered by jessica 3 · 0⤊ 0⤋