OpAmp Integrator with low frequency signal

[zok60]

op amp integrator

Using the integrator as a low pass filter, it works very well and can meet my requirement. However, when the low frequency signal or DC signal is input, the output will be nearly infinitesimal. Could any one have soultion for this problem?

Thanks!

 

[FvM]

low frequency op amp

Could any one have soultion for this problem?

That's how an integrator is supposed to work. Use a low-pass instead of an integrator.