- #1
elbw
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Hi
Please help me to solve the following problem:
There are three points given on diode characteristic (1N4148 diode)
Q1=(50uA, 0.6V)
Q2=(500uA, 0.7V)
Q3=(2mA, 0.75V)
I have to calculate:
Is - reverse bias saturation current
n - emission coefficient
I suppose I have to use Shockley equation
[tex] I_F = I_S ( e^\frac{U_F}{nU_T} - 1)[/tex]
UT = 20mV
but solving for Is and n seems to be very complicated
[tex]n=\frac{U_F}{ln(\frac{I_F}{I_S} +1) U_T }[/tex]
[tex]
I_S=\frac{I_F}{e^\frac{U_F}{nU_T}-1}
[/tex]
Are above equations correct?
Please help me to solve the following problem:
Homework Statement
There are three points given on diode characteristic (1N4148 diode)
Q1=(50uA, 0.6V)
Q2=(500uA, 0.7V)
Q3=(2mA, 0.75V)
I have to calculate:
Is - reverse bias saturation current
n - emission coefficient
Homework Equations
I suppose I have to use Shockley equation
[tex] I_F = I_S ( e^\frac{U_F}{nU_T} - 1)[/tex]
The Attempt at a Solution
UT = 20mV
but solving for Is and n seems to be very complicated
[tex]n=\frac{U_F}{ln(\frac{I_F}{I_S} +1) U_T }[/tex]
[tex]
I_S=\frac{I_F}{e^\frac{U_F}{nU_T}-1}
[/tex]
Are above equations correct?