AD8033
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The AD8033 FastFET amplifier is a voltage feedback amplifier with FET inputs, offering ease of use and excellent performance. The AD8033 FastFET op amp...
AD8033 on Analog.com
Hello,
I'm simulating the "frequency response" of error amplifier using the topology below
This topology is from below link.
https://2n3904blog.com/low-noise-high-psrr-ldo-error-amplifier/
The frequency is shown below
The pole and zero sequence of bode plot is pole -> zero -> pole
But when I change the opamp into AD8033, the frequency response seems don't matched to with result that above article derived and simulated.
My circuit and result simulated in LTspice are shown below (the passive elements are the same value copied from the article except the load and opamp itself)
The pole and zero sequence of bode plot is zero -> pole -> pole
I have no clue why it responsed like that.
Could someone point me out which steps or concepts did I miss or overlook?
Thanks!
Hi AlexSeo ,
On the computation, the VREF was removed since there it has no effect on the dynamic loop. If you remove that in the schematic, you will see a result with the response that you are looking.
Thanks,
Gio
