DEVICE FOR MEASURING RESISTANCES Russian patent published in 2005 - IPC

FIELD: electric engineering.

SUBSTANCE: supporting voltage source, analog-digital converter, made on basis of code-controlled voltage divider of type R-2R, controlled standard voltage divider and galvanometer. Galvanometer is connected between outputs of analog-digital converter and controlled standard voltage divider. Analog input of analog-digital converter is connected to support voltage source output. First clamp for connecting measured resistor is connected to output of support voltage source, second one - to upper shoulder of controlled source voltage divider. Lower shoulder of controlled standard voltage divider through second couple of clamps for connection of subject resistor, closed in short circuit, is connected to common outputs of support voltage source and analog-digital converter. Second couple of clamps is meant for connection of measured resistor in second operation mode.

EFFECT: higher precision, simplified construction.

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