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Home › Electronic Devices & Circuits › A silicon PN junction has a reverse saturation current of 10 nA. Using the ideal diode equation with n=1 and VT=25 mV, approximately by what factor does the forward current increase when the forward voltage rises by 50 mV in the exponential region?
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Electronic Devices & CircuitsPN Junction Diode

A silicon PN junction has a reverse saturation current of 10 nA. Using the ideal diode equation with n=1 and VT=25 mV, approximately by what factor does the forward current increase when the forward voltage rises by 50 mV in the exponential region?

  • A2
  • B4
  • C7.4
  • D100
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Correct Answer: C. 7.4
Explanation: The current ratio is exp(ΔV/VT)=exp(50/25)=e^2≈7.4, assuming the exponential term dominates.
Reference: Standard semiconductor electronics: diode exponential characteristic
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