Patent ID: 9717431
Date: 2017-08-01
CPC Classifications: A61B,G01R

Claim:
1. A differential voltage measuring system comprising: two electrodes that are connectable to a patient at an input and make available a respective measurement contact at an output, the two electrodes comprising a first electrode and a second electrode; a shunt resistor connected in series with the second electrode; first amplifier circuit having a first input for a first signal from the first electrode, a second input for a second signal from the second electrode, and an output; a second amplifier circuit having a first input, a second input, and an output, wherein the first input of the second amplifier circuit is connected between the shunt resistor and the second input of the first amplifier circuit, and the second input of the second amplifier circuit is connected between the second electrode and the shunt resistor; a first signal detection unit at the output of the first amplifier circuit; and a second signal detection unit at the output of the second amplifier circuit, the second signal detection unit configured to detect the signal from the second amplifier circuit as a measurement variable of a current intensity of a common-mode current.