82-op-amp-integrator-simulation

Reading Time: 1 minute

Inverting integrator amplifier realized with op-amp is given in figure bellow.

Simulate op-amp inverting integrator amplifier.

op-amp-integrator

Op-amp voltage integrator is the circuit that integrates input voltage over time. Input impedance is equal to R1, and feedback is capacitive (capacitor C).

Output voltage can be calculated as function of input voltage by equaling currents. V is on the virtual ground, so input current is

integrator_eq01

The same current flows into capacitor C, in the electrode opposite from circuit output, so output voltage, after time of integration T, is:

integrator_eq02

In here, VIN(t) is input voltage as function of time, T is the time of integration, and VOUT(0) is output voltage in starting moment of integration.

Op-amp voltage integrator is close to ideal integrator, since it can integrate both smooth and pulse inputs close to step function. It is also quite immune to surrounding noise. It is opposite to op-amp voltage differentiator that produces differentiated output for smooth input, but can’t differentiate input pulses.

Go to op-amp inverting integrator amplifier simulation.

External links:

Op-amp integrating amplifier on Electronics-Tutorials

Op-amp integrating amplifier on wisc-online

Leave a Reply

Your email address will not be published. Required fields are marked *

*