Compiling on this page some information pertaining to the phase reversal phenomenon in some opamps.
Please contribute if you have some more information on it, or see anything misstated.
https://www.analog.com/media/en/training-seminars/tutorials/MT-036.pdf (PDF is also attached in this post)
https://www.eetimes.com/The-phase-reversal-story/
https://northcoastsynthesis.com/news/whats-the-deal-with-phase-reversal/
https://forum.allaboutcircuits.com/...g-gain-wrong-in-spice-sim.196497/post-1856421
https://electronics.stackexchange.com/questions/571591/tl071-doesnt-work-like-a-generic-op-amp
https://electronics.stackexchange.c...n-inverting-input-low-cause-output-to-go-high
Below a list of opamps from Neil Johnsons web page, all the credits to him.
https://www.njohnson.co.uk/index.php?menu=2&submenu=2&subsubmenu=2
click to enlarge image
Please contribute if you have some more information on it, or see anything misstated.
https://www.analog.com/media/en/training-seminars/tutorials/MT-036.pdf (PDF is also attached in this post)
https://www.eetimes.com/The-phase-reversal-story/
https://northcoastsynthesis.com/news/whats-the-deal-with-phase-reversal/
https://forum.allaboutcircuits.com/...g-gain-wrong-in-spice-sim.196497/post-1856421
https://electronics.stackexchange.com/questions/571591/tl071-doesnt-work-like-a-generic-op-amp
https://electronics.stackexchange.c...n-inverting-input-low-cause-output-to-go-high
Below a list of opamps from Neil Johnsons web page, all the credits to him.
https://www.njohnson.co.uk/index.php?menu=2&submenu=2&subsubmenu=2
click to enlarge image
Attachments
So a behaviour during clipping is important? As I see it, its just an other bad thing going on when the s*it has already hit the fan...
/
/
It is not about clipping of the output stage. It is caused by clipping of the input stage.So a behaviour during clipping is important?
In general, if the circuit has 10x voltage gain. You can clipping output without phase reversal, because the output voltage clips way before the input stage.
So a behaviour during clipping is important? As I see it, its just an other bad thing going on when the s*it has already hit the fan...
/
You can sometimes get an undesired stable bias point when you make a loop around several of such op-amp stages, like you would in a state variable filter or a two-integrator oscillator. If the circuit ever gets into the wrong state, for example during start up or during clipping, it may stay there indefinitely.
Practical example: R4 in this conditional stability demonstration circuit was only needed to keep the circuit from getting stuck in a wrong bias point:
Last edited: