Re: gEDA-user: gnucap noise analysis

[John Doty <jpd@xxxxxxxxxxxxx>]

OK, you're well into photoconductive mode.

You should be able to use an ordinary diode model. You can use thermal
current as a stand in for photocurrent: just adjust the IS parameter to
get the correct current. The shot noise is the same whether phonons or
photons make the pairs. Capacitance modeling is the same as an ordinary
diode.

Photovoltaic mode is trickier, but if you understand the device physics
you can make a subcircuit...

John Doty          "You can't confuse me, that's my job."
MIT-related mail:                       jpd@xxxxxxxxxxxxx
Other mail:                             jpd@xxxxxxxxxxxxx

On Fri, 23 Sep 2005, Karel Kulhavy wrote:

> Is noise analysis planned in gnucap?
> 
> Is noise analysis in ngspice usable for analysis of wideband low-noise
> optical preamplifiers?
> 
> How is it possible to simulate a photodiode with 11pF capacitance @0V
> biased at 12V illuminated by N photons per second in ngspice?
> 
> CL<
>