GALVANICALLY ISOLATED VOLTAGE COMPARATOR SUPPLIED BY INPUT SIGNAL Russian patent published in 2016 - IPC G05B1/01 H03K5/24 

FIELD: control equipment.

SUBSTANCE: present invention relates to automatic control systems. Arrangement ensures a constant current of a comparator load to an input signal while the input voltage considerably exceeds the preset value of standardization. Level of standardization of input voltage is set by a variable resistor, connected at the input side of the comparator. Comparator comprises two diode optical pairs, p-n-p and n-p-n transistors, variable and four permanent resistors, Schmitt trigger of CMOS microcircuit.

EFFECT: technical result: galvanically isolated voltage comparator that does not require a separate galvanically isolated voltage supply source with minimum standardization level of not more than 2 V and variable load current in the whole range of input voltage.

1 cl, 1 dwg