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Modeling >> Semiconductor Devices >> Avalanche Photodiode model
https://designers-guide.org/forum/YaBB.pl?num=1083339830

Message started by Vinit on Apr 30^th, 2004, 8:43am

Title: Avalanche Photodiode model
Post by Vinit on Apr 30^th, 2004, 8:43am

Hello guys,
I am designing an quenching circuit for Avalanche Photo Diode(APD). My problem is, if I want to try some circuit, I have to prototype it, which is too tedious some times. Is there any tool which models the behaviour of an APD. I understand that it is really dificult to model the avalanche effect of APD, but then I wonder how do the companies which manufactuer these circuits work.
Any suggestions or advice is welcome.
Thanks in advance.

Regards,
Vinit.

Title: Re: Avalanche Photodiode model
Post by sheldon on Dec 28^th, 2004, 4:17pm

Vinit,

Could you provide more information on what you are trying
to do? In past discussion with designers, they seem to
separate the "optical" characteristics of the diode from the
"electrical" characteristics. For example, correct modeling of
the capacitance is critical because that effects the bandwidth
of the Trans-Impedance Amplifier. However, the IC designers
I have spoken with don't seem to care as much about
the "optical" characteristics of the photo-diode. Are you actually
trying to model the entire closed-loop system, for example, DVD
head positioningg, in order to model the loop dynamics?
Could you just use a table model to convert laser power
into current?

Best Regards,

Sheldon