For the attached circuit: R1=1Mohm, R2=10Mohm, C1=1uF. If the initial capacitor voltage is 0, find the output. Will this circuit work in practice? Explain. What does this circuit do?? What does this circuit do? This circuit integrates and is a low pass filter. Will this circuit work in practice? I don't see why not. The ouput voltage is equal to the voltage across the capacitor. I believe R2 is used to avoid saturation. Am I correct in all this?