VIBRATION METRE FOR EXTREME OPERATING CONDITIONS Russian patent published in 2012 - IPC G01H11/00 

FIELD: physics.

SUBSTANCE: electric charge metre has an input operational amplifier, two parallel RC circuits and an inverter, resistors, blocking capacitors, separating capacitances, two groups of k circuits, two groups of m circuits, two groups of n circuits etc. The values of resistors divided by the square root of two in the first and second parallel RC circuits must be equal to the value of the separating capacitance, multiplied by the value of the resistor connected in series to it and divided by two times the value of the capacitance from the first and second parallel RC circuits, multiplied by the square root of two and by the ratio of the value of the resistors connected to an electronic switch and a resistor connected in series to the blocking capacitor in each of the two groups of n circuits connected simultaneously.

EFFECT: rejection in the output signal of a charge-sensitive amplifier of parasitic effect on a piezo sensor of ambient temperature gradient.

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