Logarithmic graph

[Claudinho18]

Hi all. 

I want to generate this type of signal but i don't have any idea how to do this. Can you help me, please?

Thanks !

[altenbach]

Do have a problem with programming or with the math to generate the data?

[Claudinho18]

i have a problem with both.

[altenbach]

What have you tried so far?

[GerdW]

Hi Claudinho,

i have a problem with both.

Then maybe you should start with learning the math first?

Are you looking for something like this?

[altenbach]

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@Claudinho18 wrote:

i have a problem with both.

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You also have a third problem: asking questions. 😄 Is this for continuous generation or a single-shot? What's the purpose? What's the desired datatype? Is this going to an analog output? What is the amplitude, frequency, sampling rate, and time constant?

A simple square wave with an exponential filter would probably do the trick. Here's a very simple example to get you started. (Probably needs a few tweaks for initial values, offset, amplitude, a, etc.))