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Easy Way to simulate Photodiode

Message 1 of 2
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Easy Way to simulate Photodiode


I want to simulate a transimpedance amplifier with an op-amp. Is there an easy way to simulate a photodiode? I have tried to add a current source, but it doesn't behave as I want. I want the photodiode to generate current in the nA or uA range.

How can I achieve this, and if it's possible, is there a way to read the current during simulation?

Can you help me?




Message 2 of 2
in reply to: abdoubad

Hi @abdoubad,


I hope you're doing well. The analog source setup allows you to use standard prefixes like n or u for nano and micro respectively. Inside the ngspice-simulation library you'll find a current meter you can insert into your designs. If you just want to get something done quickly for school a good starting point is TinkerCAD which has a more intuitive interface for getting the basics of simulation down, it will also export to Fusion so once you need to do more sophisticated analysis you will already have  good foundation to build on.


Let me know if there's anything else I can do for you.


Best Regards,


Let me know if there is anything else I can do for you.


Best Regards,

Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

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