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posted by  hooky on 11/7/2009 9:41:16 AM  |  status: Live  |  Earned Karma: 25

Diode reference

Course Textbook Chapter Problem Needs by
Electrical Engineering Modern Control Engineering (5th) by Ogata Diodes N/A 11/8/2009 at 3:00:00 PM
Question Details:

The circuit of fig 2 uses 3 identical diodes having n=1 and Is=1.5E-14 amp.

What value of current source I would give an output voltage of 2 volt?
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posted by Tachyon12 on 11/7/2009 9:46:09 AM  |  status: Live
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Response Details:
I=I_\mathrm{S} \left( e^{V_\mathrm{D}/(n V_\mathrm{T})}-1 \right),\,

VT=25mV
n=1
IS=1.5 x 10-14

Required VD= 2/3 V
So I= 5.72mA
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