Re: Spice diode model

On Aug 31, 1:43 pm, Paul <energymo...@xxxxxxxxx> wrote:
Hi,

Does anyone have an accurate spice diode model for transient analysis
that would include shot and Johnson noise?

Thanks very much,
Paul Lowrance


After just submitting my post I can see how it's perhaps unclear. I am
not looking for a spice diode model; e.g., .MODEL HSMS-285x D
(IS=3E-6,CJO=0.18E-12,VJ=.
35,BV=3.8,IBV=3E-4,EG=0.69,N=1.06,RS=25,XTI=2,M=0.5)

What I'm trying to do is add diode noise to a transient analysis
simulation. Current causes shot noise, and diode resistance causes
Johnson noise.

So far I've been able to add noise to my resistors, which is an easy
task. For LTspice I came up with -->

Johnson noise source, in series with the resistor:
V=white(time*BW+{flat(9999999)})*3.017494931E-11*((T*BW*R)**.5)

BW is bandwdith.
T is temp is Kelvin
R is the resistance of the resistor.


The last task is to add noise to diodes, perhaps not such an easy task.

.