Both differential amplifier and differentiator react to a voltage difference. But in the differential amplifier, the difference is between two voltages applied to the amp inputs at the same time while in the differentiator, the difference is between two voltage values at adjacent moments of time.

I have met a similar question about the difference between a differential amplifier and differential resistance. And in this case, what they have in common, is the voltage difference. But while in the differential amplifier the difference is between two input voltages, in the differential resistance, the difference is between two voltage values at adjacent values of the current.

BTW there is a differential integrator - a 2-input op-amp circuit with two RC circuits. Maybe, it is possible to construct in a similar way a 2-input differential differentiator...

posted almost 4 years ago

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4y ago

Circuit fantasist‭

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