Integrator Circuits for PI.

[greylourie]

Here are a couple of alternative arrangements that I have used from time to time. The differential version is interesting as it enables you to change the integration time with a single pot. The track/hold arrangement prevents the voltage droop you get with the more common "leaky" integrator where there is a high value resistor directly across the cap.

Eric.

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Eric

Is the arrangement with the "leaky" resistor switched in only during the on-time useful only in a relatively low gain stage? Or would it offer the same benefit if implemented in something like the Hammerhead that has greater gain at the integrator stage ?

Thanks

grey.