This circuit is based on a double operational amplifier of type NE5512 and is suggested by Philips Components in its manual of linear integrated circuits, as shown in the figure. There is no need for external compensation since, with unit gain, the circuit is stable. The power supply must be symmetrical and the minimum frequency for the input signal is 200 Hz. For a good integrator like this, a phase shift greater than 89 degrees in the active frequency range must occur for a sinusoidal signal input.
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