A schottky diode and a pn junction diode have cross sectional areas a=10^-4. The reverse saturation currentdensity of the pn junction diode is 3x10^-8 A/cm^2. The reverse saturation current density of the pn junction diode is 3x10^-12A/cm^2. Determine the forward bias voltage in each diode required to yeild diode currents of 1mA.

If I use Jst=A*T^2*exp( (-q*phi|bn) / KT) to find the voltage for the Schottky diode, how do I find phi|bn from the given information?

IF I use J=q*Dn*npo/Ln+q*Dp*pno/Lp. How do I determine Ln, Lp, npo, pno, Dn, and Dp from the given information?

Thank you.

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"The reverse saturation current density of the pn jhunction diode is 3x10^-8 A/cm^2. The reverse saturation current density of the pn junction diode is 3x10^-12A/cm^2. "

This is a bit ambiguous. That's okay.

Here is a simple and straightforward solution to the problem.

I am not sure why you need all these complicated equations, I will give you a simple solution and I am sure it's right.

Although the current mechanisms in ...

Solution Summary

A schottky diode and a pn junction diode have cross sectional areas a=10^-4. The reverse saturation current density of the pn junction diode is 3x10^-8 A/cm^2. The reverse saturation current density of the pn junction diode is 3x10^-12A/cm^2. Determine the forward bias voltage in each diode required to yeild diode currents of 1mA.

1) Two identical diodes are connected in series with 100 ohms and a 2 V battery such that each diode is forward biased. Let Io = 10fA; n = 1, T = 25 degrees C. Calculate the loop current if (a) ideal diodes are assumed; (b) VD = 0.6 V for each diode; (c) each diode is represented by a piecewise-linear model that is exact at ID

A 5.1 K resistor is connected between the cathode of a 6.2 V zener diode and a 12 V power supply. The anode of the diode is connected to 6 V. Approximately how much current will flow through the diode?

A 5.1K resistor is connected between the cathode of a 6.2V zener diode and a 12V power supply. The anode of the diode is connected to 6V. Approximately how much current will flow through the diode?

Consider an ideal pn junction diode at T=300K operating in the forwared bias region. Calculate the change in diode voltage that will cause a factor of 10 increase in current.

In the zener diode circuit calculate the value of the current through the zener diode if the power supply is rated 24 volts at 500 milli amperes. The load voltage is 12 volts and draws a current of 300 milli amperes. Also calculate the value of the series resistance R.

Preamble
It can be shown that the reverse saturation current in a diode is given by the equation:
Is= BT^(2/3) exp (-Eg/NkT)
where B is a constant that involves the physical properties, doping and geometry of the junction
T is the absolute temperature
Eg is the energy gap of the semiconductor in joules
k is the Bolt

The measured I-V characteristics of a silicon high-speed diode (BAS16) are given in TABLE 1, below.
(i) Plot a graph of the diode's forward characteristic.
(ii) Compare the values of the diode's dynamic resistance and reverse current as obtained from TABLE 1 with those predicted by the diode equation. Attempt to account for

Q- The current I as a function of voltage V for a certain diode is given by
I(V)=I_0 (e^(eV/kT) - 1)
Here k is Boltzmann's constant, e is the charge on an electron (magnitude), and T is the absolute temperature. Let at room temperature (t = 20 degree C), I_0 = 1.5 × 10^(-9)A.
(A) What is the resistance of the diode for