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engineering
electrical engineering
october 2019
21

Electrical Engineering Questions and Answers October 21, 2019

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A P-N junction diode with T = 100 ns conducts a forward-bias current I D = 4.3 mA. At time t = 0, the circuit conditions change, so that a reverse-bias voltage V E = 20 V is connected in series with the diode and a resistor R = 1K.

(a) Because of the strong discharging current ( 20.7 V1 k2 20.7 mA), the contribution of the recombination to the stored charge removal can be neglected. How long will it take for the stored charge to be removed (b) If VE 0, the diode is discharged with a much smaller current (0.7 V1 k2 0.7 mA), so that the contribution from the recombination

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