Transcription of Physical Explanation - Vishay Intertechnology
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Physical Explanation - Vishay Intertechnology
Vishay GENERAL SEMICONDUCTORR ectifiersApplication NotePhysical ExplanationAPPLICATION NOTE Revision: 16-Aug-111 Document Number: 84064 For technical questions within your region: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT TERMINOLOGYS emiconductor diodes are used as rectifiers, switches,varactors and voltage stabilizers (see Zener data book).Semiconductor diodes are two-terminal solid-state deviceshaving asymmetrical voltage -current characteristics. Unlessotherwise stated, this means a device has single pn-junctioncorresponding to the characteristics shown in figure 1. Fig. 1 An application of the voltage current curve is given bywhereIf the diode is forward-biased (anode positive with respectto cathode), its forward current (I = IF) increases rapidly withincreasing voltage .
Switching on Characteristic Forward recovery time, tfr The time required for the voltage to reach a specified value (normally 110 % of the steady state forward voltage drop), after instantaneous switching from zero or a specified reverse voltage to a specified forward biased condition (forward current).
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