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It is simulation results. I'm using this opamp in SC circuits which works at 120MHz sampling frequency.I'm using 0.2V pk-pk and use 1.2v as supply voltage. another thing is that I use 90nm CMOS technology.
when we use this opamp with 80dB distortion in SH I think it doesn't make a problem but when I use it in the pipeline adc, this 3rd harmonic appears in the spectrum and decreas SINAD so I want to know that where is the problem in opamp in order to decrease 3rd harmonic and increase SINAD in...
Hi everybody.
I have a big problem with 3rd Harmonic. I designed an opamp with 68dB gain and 360 MHz B.W and 60' phase margin.
when I used this opamp in the S.C sample and hold Circuits it has a large distortion in 3rd harmonic. I'm going to know which element of my opamp makes the most...
Hi
I designed an opamp which has four transistor that their width are 300 um.My quastion is that when I'm using 90nm CMOS process in my project, having transistors with this width(during drawing layout and fabrication) make problem or not?
Does this amount for width is huge or not?
bias voltage indpendant with temparature
Hi
I'm using this circuit in order to stable bias voltage from derivation with temperature as Daivid Jones in analog circuits design said.
In order to making stable all of gm transistors in folded cascade opamp I'm using this circuits. Does it true?
My...
Hi everybody
How can I obtain gain and bandwidth and phase margin in folded cascode opamp?
Does anybody has a circuits model to implement it in hspice?
Thank you.
Re: problem in phase diagram of opamp
Thank you for replying
Could you explain your reason? please. I don't understand it.
I guess that I have a low frequency zero but I can't handled it that why is it happen?
Could you give an advise for solving it or which book I have to read for increasing...
Hi
You can find a good option control at hspice help document but I want to advise i another way.
I think you should take a look at your circuits because convergence problem will occur when you have a high current in your circuits which hspice can stop it so hspice stop the simulation. if you...
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