[AVR] Sine wave generation sampling logic

[Thomas Jacob]

Hi geeks,

I have a requirement to generate a sine wave in the range 5Hz to 5 KHz using DAC.
I think the lookup table method matches my requirement.

But the problem which i am facing is that how to choose the number of samples for each frequency and the sampling interval.
I need to explain the logic why i choose the specific number of samples and the sampling interval.
could you guys please help me out..!!

 

[FvM]

I need to explain the logic why i choose the specific number of samples and the sampling interval.

You need to understand how these parameters are related to your generator specification (e.g. THD, suppression of spurious frequencies).

A promising topology is a DDS generator. https://en.wikipedia.org/wiki/Direct_Digital_Synthesis