creating sine wave with variable frequency depending on variable

So I need a sine wave that has a variable frequency. The freuqency is depending on a variable. If the variable increases, the frequency should also increase, but if the variable stays constant, the frequency should also be constant. So the variable looks like that.

And with this setup

where Omega is the variable I got it to work, but of course over time the frequency still increases because of the clock. But without the clock the sine wave changes to a constant value if the vairable gets constant.

Maybe the sine wave block can help but I didn't find any way how I can integrate a variable into the block.

Does somebody know how to create the described sine wave?

Answer 1

[Mathieu NOE]

hello

this is my suggestion - see attachement (R2020b)

code for initialization :

Fs = 1000;
dt = 1/Fs;

% angular table 
n = 360; % one degree resolution
angl = (0:(n-1))*2*pi/n;
tabl_sin = sin(angl);

open('sine_vco.slx');

[Kai Falkenhain]

Thank you very much, it works perfectly.

[Mathieu NOE]

My pleasure !