6 - Diodes

Assume they are in off region replace the 2 diodes

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+ Assume they are in OFF region, replace the 2 diodes with their equivalent model. - V D2 - + V D - R + - 2 1 S D D S V V V and V V V + - V s I D =0 + - V R V D1 + V D1 =V D2 since I D is the same 2 2 1 D D V D2 - Testing whether they are in the OFF PWL region: V D1 0.7 This is true as long as 4 . 1 s V
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Example circuit with 2 or more diodes A th i ON i l it R + Assume they are in ON region, replace it with the equivalent model. + - V s I D V D1 + - V R + R V I D + - V R - V D2 - + V D - + V I V V V s D D o 4 . 1 4 . 1 2 1 + - s + - 0.7V 0.7V - + V D R D T ti h th it i i th ON PWL i I 0 - Testing whether it is in the ON PWL region: I D This is true as long as 4 . 1 0 4 . 1 s s V or R V
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  • Fall '08
  • C.YTSUIandMansunChan
  • R VR, PWL region, diode VD ID, ID ID VD

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