FIELD: industrial electronics.
SUBSTANCE: invention relates to industrial electronics, analogue-digital engineering and circuitry. Differentiator comprises an operational amplifier, a capacitor and a resistor, one of the terminals of the capacitor forms the input of the differentiator relative to the "ground", the other terminal is connected to the inverting input of the operational amplifier, and the non-inverting input is grounded, one of the resistor leads is connected to the common terminal of the capacitor and the inverting input of the operational amplifier. Differentiator includes an additional operational amplifier, the inverting input of which is connected to the common terminal of the capacitor, the inverting input of the existing operational amplifier and the resistor, the free terminal of the latter is connected to the output of the additional operational amplifier, said output also forms the output of the differentiator relative to the "ground", the non-inverting input of the additional operational amplifier is connected to the output of the existing operational amplifier.
EFFECT: technical result consists in reducing the error of differentiation from the final value of the coefficient.
1 cl, 1 dwg
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