An intergrator op amp (operational amplifier) is one type of op amp circuit. The Integrator operational amplifier circuit performs the mathematical operation of Integration. The magnitude of its output is determined by the length of time a voltage is present at its input. The output voltage is proportional to the length of time a voltage is present. The longer the input is present, the greater the output becomes. One great application of the integrator is generating a ramp voltage.

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