Are you referring to my last posting?
If you have 4 identical sections - each with a damping factor of 1/SQRT(2) - you need active gain stages with a total gain of "4" in order to have a loop gain of 4*0.25=1. OK?
Hi
After read and reread the post I get finally what I want, an inverted and non-inverted sine wave.
So thanks to anyone for ther reaction and advice.
thank you for your patient
Hi
After read and reread the post I get finally what I want, an inverted and non-inverted sine wave.
So thanks to anyone for ther reaction and advice.
thank you for your patient
The photo in the first reply in this thread also shows the jagged edges. Maybe his opamps are oscillating at a high frequency, maybe there is another high frequency circuit nearby or maybe there is an AM radio station nearby.
Hi Audioguru
Your Question about a jagged sine, I really don't know.
Remember, the scope is a simpel usb device, I can see the wave, and the shape give me
a direction right or false, good or bad.
One thing is sure, the device have help me to the solusion.
The opamp, the LME49740, can be a limited factor, but I don't know how to find a better one.