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I'm not sure what you mean by "Reverse saturation current". When a normal diode such as 1n4148 is reverse biased, it is switched off and only a small leakage current flows. This reverse current increases at higher temperatures.
Actually i m looking for PN Junction diode in detail. wehave found that Reverse saturation current is quite low in Reverse bias and it increases with increse in temp. i wanna know how.
Actually i m looking for PN Junction diode in detail. wehave found that Reverse saturation current is quite low in Reverse bias and it increases with increse in temp. i wanna know how.
When you ask "how", do you mean how much? Look at Schockley's diode equation and calculate the current at say, 1°, 5°, and 10°, and see what the difference is.
there are several thing to know for purely temperature is not the only criteria as the mobility of the carriers are varied with increase in temperature
reverse saturation current is due to minority carriers in diode, as temperature increases no, of minority carriers will increase hence saturation current increases
reverse saturation current is due to minority carriers in diode, as temperature increases no, of minority carriers will increase hence saturation current increases
this is true cos of the more energy gained by the minority carriers from what is called thermal voltage (Vt) by the heat energy dissipated at the junction
higher heat=>> high voltage =>> more minority carriers =>> higher reverse sat current
if you want measure temperature you can use a PN junction diode either in the forward biased condition or in the reversed biased condition in the forward condition the voltage drop across diode would be reduced by 2.5mV/oC in the reversed condition the reverse current thro' the diode would increase
if you want measure temperature you can use a PN junction diode either in the forward biased condition or in the reversed biased condition in the forward condition the voltage drop across diode would be reduced by 2.5mV/oC in the reversed condition the reverse current thro' the diode would increase
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