Photodiode in SimElectronics: details on physical signal port

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Alexander Efremov
Alexander Efremov 2012-7-26
回答： Sabin 2025-8-12
There is a relatively close question nearby by the way.
As it's easy to understand from the description of Photodiode block in SimElectronics, this block produces a current Ip that is proportional to the Radiant flux density presented at the physical signal port D using the following formula: Ip = Device sensitivity * Radiant flux density
Sensitivety is something that I may parametrize in the mask dialog.
The question is, in what units this physical signal aquired by port D may be described if I use physical constant for instance?
  1 个评论
Alexander Efremov
Alexander Efremov 2012-7-26
Answer to myself. Please verify and correct if wrong.
It seems, that the unit is the same as in sensitivity parametrization (W/m^2 by default), because to receive current in Ip = Device Sensitivity * Radiant flux density I have to multiply Device Sensitivity m^2*A/W on W/m^2.
Other dynamics depend on diode and other parameters, not on the flux density.

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回答（1 个）

Sabin
Sabin 2025-8-12
A few things changed since 2012. SimElectronics is now part of Simscape Electrical. The Photodiode input W (which I believe use to be called D back in the day) is indeed W/m^2 by default.

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