All about the sampling

[chri$]

Hi everyone,

These last days, I read about the sampling theorem that use to convert a digital signal to an analog signal or conversely. So, I ask some question about this topic in order to get a more understanding of that theorem. Like, that skill use a quantizer in order to take a voltage value from the input signal. Then, that value will be sampled. Am I right ?

 

[andre_luis]

Exactly...


+++

 

[chri$]

I found a demo about the sampling. It shows its process. And I have another question, the sampling process stops once the the sampling frequency is below the input frequency ? Because in the demo, the process stops twice.

Here's the link. It will work if you have scilab.
https://fileexchange.scilab.org/toolboxes/280000/1.0/files/Shannnon 1.0.sce

 

[godfreyl]

The sampling frequency must be more than double the signal frequency.
(Sorry, I don't have scilab)

 

[chri$]

Yes, that's right. And with the same case, the signal can be recovered from its samples. It's pity that you don't have scilab. But thanks for your reply. As I thank andre_teprom for his reply.