GALVANICALLY ISOLATED VOLTAGE COMPARATOR WITH SUPPLY SIGNAL POWER SUPPLY Russian patent published in 2020 - IPC G05B1/01 H03K5/24 

FIELD: control systems.

SUBSTANCE: invention relates to control systems. Galvanically isolated voltage comparator with supply from input signal consists of first and second resistors of high-resistance voltage divider, controlled stabilitron, stabilitron, stabilotron supply resistor, current-setting resistor of LED of optoelectronic switch of logic signal, bipolar transistor of p-n-p conductivity, resistor for blocking of operation of light-emitting diode of optoelectronic switch of logic signal from residual current of cathode of controlled stabilitron and optoelectronic switch of logic signal. Input voltage comparison level is set by the high-ohmic resistor voltage divider connected by the middle output to the controlled stabilotron support. Cathode of the LED of the optoelectronic logic signal switch is connected to the cathode of the controlled stabilitron, and the anode, through the transistor and the current-setting resistor, to the input signal of the comparator.

EFFECT: current of consumption from source of input signal of galvanically isolated comparator remains constant at input voltages considerably exceeding level of comparison.

1 cl, 1 dwg