Electronic – Deviation from typical I-V characteristics of a diode in high frequency


Why the diode shows a loop in the I_V characteristics?(Diode part N4003, Frequency was 100k) My instructor told me something regrading the retardation of charge carriers but I couldn't understand/find anything.Will someone please explain it to me? enter image description here

Best Answer

Reverse recovery time quote from Wiki: -

Following the end of forward conduction in a p–n type diode, a reverse current can flow for a short time. The device does not attain its blocking capability until the mobile charge in the junction is depleted.

This is why some diodes are useless for switching circuits or power supplies or for radio frequency applications. Some versions of the 1N400x diode can have reverse recovery times of 30 us: -

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