FREQUENCY CONVERTER OF STRAIN BRIDGE UNBALANCE SIGNAL Russian patent published in 2010 - IPC H03K5/00 

FIELD: radio engineering.

SUBSTANCE: integrator includes output resistance of strain gage bridge and resistance of cable line, and also reduction of resistive-strain sensors heating temperature from current flow path to output signal. Frequency converter of strain bridge signal made of sensor strain bridge, integrator arranged on the basis of operational amplifier with the first capacitor in circuit of negative feedback and resistor, connected to inverting input of operational amplifier, output of which is connected to the first inlet of comparator, output of which is connected to one of tops in diagonal of strain bridge supply, input of integrator is connected to one of tops in metering diagonal of strain bridge, and its other top is connected to non-inverting input of operational amplifier of integrator and to the second input of comparator, differing by the fact that the second capacitor is connected between output of comparator and input of integrator, and the second top of strain bridge supply diagonal is connected to "ground" bus through additional resistor.

EFFECT: improved accuracy of sensor strain bridge unbalance signal transformation due to reduction of impact from integrator resistance RH.

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