About Integrator

[pretty]

Hi, Everyone; Anybody could help me analysize my sch about Integrator.  Why it have diffrent result when I change R3 between 1oh and 0oh. 

[supsup]

In parametres virtual OPA it is necessary to replace Unity-Gain Bandwidht with 10 MHz, for example

[pretty · Accepted solution]

Thank you! supsup. I have tried it. it works. would you tell me the reasons.

[supsup]

pretty, I'm not so good in English to completely describe this case. The main thing:
1. It is not the integrator, but the amplifier.
2. The strengthening factor is determined by the relation of resistors R1 and R3 (for AC it is necessary to consider resistance of the condenser on the given frequency Rc=1/2πFC ).

[pretty]

Thanks for your answers,  supsup!  Are you not a American man. I am a Chinese man.  I am a network engineer. I hope we can contact often and help each other.

[supsup]

Pretty, I your northern the neighbour. I am engaged in automatic systems. There will be questions, write to me actsu@actfilm.ru