Author Topic: how to know the type of linearity ?  (Read 775 times)

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Offline harrysmithTopic starter

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how to know the type of linearity ?
« on: October 07, 2020, 09:26:08 pm »
Hello everyone.
is there a method to follow to know that a system is linear or non-linear in electronic field of sensors ?
 

Offline indeterminatus

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Re: how to know the type of linearity ?
« Reply #1 on: October 07, 2020, 10:32:34 pm »
Note that I am a beginner myself.

My understanding is: a system is only linear if all of its components (at least on a very abstract, lumped component level) are linear. It becomes non-linear once you introduce a non-linear component.

Not sure I understand your question. Could you be more precise?
 

Offline harrysmithTopic starter

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Re: how to know the type of linearity ?
« Reply #2 on: October 08, 2020, 02:02:25 am »
precisely on a datasheet of a BPW41N photodiode sensor. or I can know its linearity. do we observe these graph characteristic of the datasheet. if so how ?
https://pdf1.alldatasheet.com/datasheet-pdf/view/26252/VISHAY/BPW41N.html
 

Offline ChristofferB

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Re: how to know the type of linearity ?
« Reply #3 on: October 08, 2020, 06:24:18 am »
I think you're mixing two concepts: a circuit component or circuit can be linear or nonlinear (based on C-V response I believe)
https://en.m.wikipedia.org/wiki/Linear_circuit


The linearity of a sensor is a completely separate physical quality, as a photodiode by the above definition is a nonlinear component, its light intensity to current conversion can be linear within a range.

I guess youd have to compare its output against a calibrated variable intensity light source.
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Offline Simon

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