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P-N Junction Diode

# P-N Junction Diode - Luke Wyatt P-N Junction Diode P-N...

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Luke Wyatt P-N Junction Diode 02/11/07 P-N Junction Diode Risk Assessment 1. Electrical Results dc Voltage diode V (V) 100 V (V) I (A) X c (Ω) C (pF) 2 1 C (pF²) 0 500m 1m 10 μ 50k 1.27 0.617 x 12 10 -1 500m 0.5m 5 μ 100k 0.636 2.47 x 12 10 -2 500m 0.4m 4 μ 125k 0.509 3.86 x 12 10 -3 500m 0.4m 4 μ 125k 0.509 3.86 x 12 10 -4 500m 0.3m 3 μ 167k7 0.382 6.85 x 12 10 -5 500m 0.3m 3 μ 166k7 0.382 6.85 x 12 10 -6 500m 0.3m 3 μ 166k7 0.382 6.85 x 12 10 -7 500m 0.2m 2 μ 250k 0.255 15.42 x 12 10 -8 500m 0.2m 250k 0.255 15.42 x 12 10 Calculations 3 6 100 1 10 10 10 100 100 V x I X A - - = = = 3 6 500 10 50 10 10 diode c V x X K I x - - = = = 12 6 3 1 1 1.27 10 1.27 2 2 10 50 10 c C X F pF fX x π π - = = = = 23 2 11 2 2 12 2 1 1 6.17 10 6.17 10 (1.27 10 ) X F X pF C X - = = = 1 of 3

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Luke Wyatt P-N Junction Diode 02/11/07 2 of 3
Luke Wyatt P-N Junction Diode 02/11/07 Calculations 24 2 1 8.57 10 X C δ = ( ) 1 V δ = 24 8.57 10 1 X gradient = where 19 10 0 2 16 4 1.6 10 1.053 10 / 10 s q X X F m A m ε ε - - - = = = 20 3 2 19 10 16 24 0 2 2 1.38 10 1.6 10 1.053 10 10 8.57 10 D s N X m q A gradient X X X ε ε - - - - = = = Voltage Range Gradient Doping concentration (m 3 - ) -8 to -5 V 2.86x10 24 4.15x10 20 -5 to -2 V 9.97x10 23 1.19x10 21 Errors There were some errors in the collection of the results. Firstly there was an error in reading the oscilloscope correctly. There was lots of noise interference on both
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