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08:54 Nov 21, 2008
English to Romanian translations [PRO] Science - Physics Additional field(s): Electronics / Elect Eng
English term or phrase:dark current
Definition from Tyco Electronics Corporation: The thermally induced current that exists in a photodiode in the absence of incident optical power.
This voltage may be as low as 10 mV or as high as 50 V and the dark currents may vary from pA to μA depending upon the junction area and the process used. Dark current is always specified at a particular value of reverse applied voltage. optoelectronics.perkinelmer.com
The photodiode noise in is the sum of the thermal noise (or Johnson noise) ij of a resistor which approximates the shunt resistance and the shot noise isD and isL resulting from the dark current and the photocurrent. Hamamatsu Corporation
Dark current is dependent on temperature. While dark current may initially be low, it will increase as the device temperature increases. tpub.com
Printr-un semiconductor supus unei diferenţe de potenţial U va trece un curent electric
slab (de întuneric), care creşte, atunci când semiconductorul este iluminat, datorită
fotoconducţiei. Intensitatea fotocurentului, diferită de cea a curentului de întuneric, depinde
de temperatură, tensiunea electrică aplicată şi de durata iluminării. - UNIV."POLITEHNICA" DIN BUCUREŞTI
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