Hello all!

I'm doing a simulation about ramp generator(attached image), my problem is that the upper and lower thresholds of schmitt trigger(Vh and Vl) in my simulation are not the same with my calculated values(attached formula image).

Also, instead of ramp wave I get an output of triangular.

Thank you for taking time reading my inquiry. Godbless!

 

The discharge cycle of the cap is controlled largely by Rdson of
MN2, and it is exponential. But at low Pk-Pk cap V it can look
linear to a first order approximation.

What device is the schmidt, how did you derive those equations ?

Regards, Dana.

 

One thread is enough.
Please don't double post.

increasing frequency of ramp generator.
https://forum.allaboutcircuits.com/threads/increasing-frequency-of-ramp-generator.147494/